This programming language may be used to instruct a computer to perform a task.
Execution method: | Interpreted |
---|---|
Garbage collected: | Allowed (and in most versions of REXX, it is automatic, but garbage collection isn't mandated). |
Parameter passing methods: | By value |
Type safety: | Safe |
Type strength: | Strong |
Type compatibility: | Nominative |
Type expression: | Inferred |
Type checking: | Dynamic |
Typing: | Untyped |
See Also: |
If you know REXX, please write code for some of the tasks not implemented in REXX.
This page uses content from Wikipedia. The original article was at REXX. The list of authors can be seen in the page history. As with Rosetta Code, the text of Wikipedia is available under the GNU FDL. (See links for details on variance) |
REXX (REstructured eXtended eXecutor) is an interpreted programming language which was developed at IBM. It is a structured high-level programming language which was designed to be both easy to learn and easy to read. Both proprietary and open source interpreters for REXX are available on a wide range of computing platforms, and compilers are available for IBM mainframes.
REXX is also spelled:
- Rexx
- REXX
- but the primary official spelling is REXX and is the spelling used here on Rosetta Code.
The REXX language was influenced by the computer programming languages: ALGOL, PL/I, EXEC, and EXEC 2.
Versions of REXX:
- ARexx is a classic REXX implementation (with extensions) for the AmigaOS, given in bundle since AmigaOS 2. (Regina REXX has specific support for the extended functions that were introduced in ARexx.) ARexx was written in 1987 by William S. Hawes.
- Brexx a classic REXX written by Vassilis N. Vlachoudis, it is free and it's open source and available under the GNU General Public License.
- CRX REXX (Compact REXX) is a classic REXX first written by Dr. Brian Marks.
- CTC REXX is a classic REXX that is bundled with PC/SPF and written by Command Technology Corporation, a license is required to use this product. This version of REXX can only be used under PC/SPF and it's panels. PC/SPF resembles the IBM program product SPF (which has other names and versions).
- KEXX is a subset of REXX that is bundled with KEDIT and written by Keven J. Kearney of Mansfield Software Group, Inc., a license is required to use this product. KEXX only executes under the KEDIT licensed product. KEDIT is an XEDIT clone (an editor from IBM for VM/CMS program products).
- MVS/TSO REXX is IBM's implementation of classic REXX, a license is required to use the product as well as the operating system it runs under; MVS and TSO are used here as generic references.
- MVS/TSO REXX compiler is an IBM implementation of classic REXX, a license is required to use this product as well as the operating system it runs under.
- NetRexx is IBM's variant of the REXX programming language to run on the Java virtual machine. It supports a classic REXX syntax, with no reserved keywords, along with considerable additions to support Object-oriented programming in a manner compatible with Java's object model, yet can be used as both a compiled and an interpreted language, with an option of using only data types native to the JVM or the NetRexx run-time package. The syntax and object model of NetRexx differ from Object REXX and Open Object Rexx.
- Object REXX is/was an object-oriented scripting language initially produced by IBM for OS/2. It is a follow-on to and a significant extension of the "Classic Rexx" language originally created for the CMS component of VM/SP and later ported to MVS, OS/2 and PC DOS. OS/2 version of IBM Object REXX is deeply integrated with SOM. On October 12, 2004, IBM released Object REXX as open source software, giving rise to Open Object Rexx (ooRexx).
- ooRexx (Open Object Rexx) is an implementation of Object REXX, which is REXX with OO features (some REXX programs are compatible).
- OS/2 REXX is a classic REXX that is an IBM implementation of classic REXX, a license is required to use this product as well as the operating system it runs under.
- OS/400 REXX is an IBM implementation of classic REXX, a license is required to use this product as well as the operating system it runs under.
- PC/REXX is the first classic REXX implemented outside of IBM mainframes, intended for IBM DOS and MS DOS. Written by Mansfield Software Group, Inc., REXX was bundled with KEDIT, a license is required to use this product.
- Personal REXX is a classic REXX that is intended for IBM DOS and MS DOS, written by Charles Daney of Quercus Systems, a license is required to use this product. It is also known as REXX/Personal.
- Portable REXX (see the R4 REXX entry, below).
- Regina REXX is an implementation first created by Anders Christensen (in 1992) and is now maintained by others, notably Mark Hessling. Regina REXX runs on more different platforms than any other REXX, too many to name here. It can be downloaded freely.
- Reginald REXX is a REXX developed by Jeff Glatt. It can be downloaded freely.
- REXX/imc a classic REXX developed by Ian M. Collier (imc) for Linux/Unix.
- REXX/Personal is another name for Personal REXX (see above).
- ROO oo-REXX an object-oriented REXX developed by Keith Watts of Kilowatt Software, Inc. It can be downloaded freely. ROO is also known as ROO!.
- R4 REXX a classic REXX developed by Keith Watts of Kilowatt Software, Inc. It was also known as Portable REXX. It can be downloaded freely.
- T/REXX, a REXX compiler for CMS is an implementation of classic REXX written by Leigh Lundin and Mark Woodruff (according to Wikipedia).
- VM/CMS REXX is an IBM implementation of classic REXX that was first implemented (for general use) in the early 1980s. A license is required to use this product as well as the operating system that it runs under. This was the original implementation of REXX written (circa 1979) by Mike Cowlishaw of IBM.
- VM/CMS REXX compiler is an IBM implementation of classic REXX, a license is required to use this product as well as the operating system it runs under.
[Most of the entries were entered mostly from memory and apologies are offered for not knowing more about what wording should be used; the IBM operating systems or Program Products that run REXX are numerous and varied. Their complete (official) names would fill a pageful or two. Some of the REXXes are no longer sold nor available for downloading or purchase, others are no longer maintained. Naming of names is being avoided (especially those licensed products for sale), and it is hoped that this is seen that no products nor vendors are being endorsed, appraised, or critiqued.] -- Gerard Schildberger 09:28, 1 July 2012 (UTC)
External Links[edit]
- English Wikipedia REXX
- Brexx interpreter
- Open Object Rexx - www.oorexx.org
- The NetRexx Programming Language - www.netrexx.org
- The Rexx Language Association - www.rexxla.org
- Regina Rexx Interpreter
- Mansfield Software Group, Inc. (KEDIT)
- Personal REXX, Quercus Systems
- CTC Command Technology
- CRX Open Source (right column side)
- R4, Kilowatt Software
- ROO, Kilowatt Software
- z/VM V6R1 REXX/VM Reference
- z/VM V6R1 REXX/VM User's Guide
- {many references to REXX manuals}
Rosetta Code tasks not implemented in REXX[edit]
Reports:Tasks_not_implemented_in_REXX
Subcategories
This category has the following 4 subcategories, out of 4 total.
Pages in category "REXX"
The following 1,099 pages are in this category, out of 1,099 total.
A
- A* search algorithm
- A+B
- Abbreviations, automatic
- Abbreviations, easy
- Abbreviations, simple
- ABC problem
- ABC words
- Abelian sandpile model/Identity
- Abstract type
- Abundant odd numbers
- Abundant, deficient and perfect number classifications
- Accumulator factory
- Ackermann function
- Active Directory/Search for a user
- Additive primes
- Address of a variable
- Air mass
- AKS test for primes
- Align columns
- Aliquot sequence classifications
- Almkvist-Giullera formula for pi
- Almost prime
- Alternade words
- Amb
- Amicable pairs
- Anagrams
- Anagrams/Deranged anagrams
- Angle difference between two bearings
- Angles (geometric), normalization and conversion
- Animate a pendulum
- Animation
- Anonymous recursion
- Anti-primes
- Append a record to the end of a text file
- Apply a callback to an array
- Apply a digital filter (direct form II transposed)
- Approximate equality
- Arbitrary-precision integers (included)
- Archimedean spiral
- Arena storage pool
- Arithmetic evaluation
- Arithmetic-geometric mean
- Arithmetic-geometric mean/Calculate Pi
- Arithmetic/Complex
- Arithmetic/Integer
- Arithmetic/Rational
- Array concatenation
- Array length
- Arrays
- ASCII art diagram converter
- Assertions
- Assertions in design by contract
- Associative array/Creation
- Associative array/Iteration
- Associative array/Merging
- Attractive numbers
- Audio alarm
- Average loop length
- Averages/Arithmetic mean
- Averages/Mean angle
- Averages/Mean time of day
- Averages/Median
- Averages/Mode
- Averages/Pythagorean means
- Averages/Root mean square
- Averages/Simple moving average
B
- Babbage problem
- Bacon cipher
- Balanced brackets
- Balanced ternary
- Barnsley fern
- Base-16 representation
- Base58Check encoding
- Base64 encode data
- Bell numbers
- Benford's law
- Bernoulli numbers
- Best shuffle
- Bin given limits
- Binary digits
- Binary search
- Binary strings
- Bioinformatics/base count
- Bioinformatics/Subsequence
- Biorhythms
- Birthday problem
- Bitmap
- Bitmap/Bresenham's line algorithm
- Bitmap/Flood fill
- Bitmap/Midpoint circle algorithm
- Bitmap/Read a PPM file
- Bitmap/Write a PPM file
- Bitwise IO
- Bitwise operations
- Boolean values
- Box the compass
- Brace expansion
- Brazilian numbers
- Brownian tree
- Bulls and cows
- Bulls and cows/Player
- Burrows–Wheeler transform
C
- Caesar cipher
- Calculating the value of e
- Calendar
- Calendar - for "REAL" programmers
- Calkin-Wilf sequence
- Call a foreign-language function
- Call a function
- Call a function in a shared library
- Canonicalize CIDR
- Cantor set
- Card shuffles
- Carmichael 3 strong pseudoprimes
- Cartesian product of two or more lists
- Case-sensitivity of identifiers
- Casting out nines
- Catalan numbers
- Catalan numbers/Pascal's triangle
- Catamorphism
- Change e letters to i in words
- Changeable words
- Chaos game
- Character codes
- Chebyshev coefficients
- Check input device is a terminal
- Check Machin-like formulas
- Check output device is a terminal
- Check that file exists
- Chemical calculator
- Cheryl's birthday
- Chinese remainder theorem
- Cholesky decomposition
- Chowla numbers
- Circles of given radius through two points
- Circular primes
- Cistercian numerals
- Closest-pair problem
- Closures/Value capture
- Code segment unload
- Collections
- Color of a screen pixel
- Colour bars/Display
- Combinations
- Combinations and permutations
- Combinations with repetitions
- Comma quibbling
- Command-line arguments
- Commatizing numbers
- Comments
- Common list elements
- Common sorted list
- Compare a list of strings
- Compile-time calculation
- Compound data type
- Conditional structures
- Conjugate transpose
- Consecutive Primes With Ascending Or Descending Differences
- Constrained random points on a circle
- Continued fraction
- Continued fraction/Arithmetic/Construct from rational number
- Convert decimal number to rational
- Convert seconds to compound duration
- Convex hull
- Conway's Game of Life
- Coprime triplets
- Coprimes
- Copy a string
- Copy stdin to stdout
- Count in factors
- Count in octal
- Count occurrences of a substring
- Count the coins
- Cousin primes
- Cramer's rule
- CRC-32
- Create a file
- Create a file on magnetic tape
- Create a two-dimensional array at runtime
- Create an HTML table
- CSV data manipulation
- CSV to HTML translation
- Cuban primes
- Cubic Special Primes
- Cumulative standard deviation
- Currency
- Currying
- CUSIP
- Cut a rectangle
- Cycle detection
D
- Damm algorithm
- Data Encryption Standard
- Date format
- Date manipulation
- Day of the week
- Days between dates
- De Bruijn sequences
- Deal cards for FreeCell
- Death Star
- Decimal - Hexadecimal numbers
- Decimal floating point number to binary
- Decision tables
- Deconvolution/1D
- DELAY.REX
- Delete a file
- Department numbers
- Detect division by zero
- Determinant and permanent
- Determine if a string has all the same characters
- Determine if a string has all unique characters
- Determine if a string is collapsible
- Determine if a string is numeric
- Determine if a string is squeezable
- Determine if only one instance is running
- Determine if two triangles overlap
- Dice game probabilities
- Digital root
- Digital root/Multiplicative digital root
- Dijkstra's algorithm
- Dinesman's multiple-dwelling problem
- Dining philosophers
- Discordian date
- Display a linear combination
- Distinct Palindromes Within Decimal Numbers
- Distribution of 0 Digits in Factorial Series
- Diversity prediction theorem
- DNS query
- Documentation
- Doomsday rule
- Dot product
- Doubly-linked list/Definition
- Doubly-linked list/Element definition
- Doubly-linked list/Element insertion
- Doubly-linked list/Traversal
- Dragon curve
- Draw a clock
- Draw a cuboid
- Draw a pixel
- Draw a sphere
- Dutch national flag problem
- Dynamic variable names
E
- Eban numbers
- Eertree
- Egyptian division
- Egyptian fractions
- EKG sequence convergence
- Element-wise operations
- Elliptic curve arithmetic
- Emirp primes
- Empty directory
- Empty program
- Empty string
- Enforced immutability
- Entropy
- Entropy/Narcissist
- Enumerations
- Environment variables
- Equilibrium index
- Erdős-primes
- Esthetic numbers
- Ethiopian multiplication
- Euler method
- Euler's identity
- Euler's sum of powers conjecture
- Evaluate binomial coefficients
- Even or odd
- Events
- Evolutionary algorithm
- Exceptions
- Exceptions/Catch an exception thrown in a nested call
- Executable library
- Execute a Markov algorithm
- Execute a system command
- Execute Brain****
- Execute HQ9+
- Exponentiation operator
- Exponentiation order
- Exponentiation with infix operators in (or operating on) the base
- Extend your language
- Extensible prime generator
- External sort
- Extra primes
- Extract file extension
- Extreme floating point values
F
- Factorial
- Factorions
- Factors of a Mersenne number
- Factors of an integer
- Fairshare between two and more
- Farey sequence
- Fast Fourier transform
- FASTA format
- Faulhaber's triangle
- Feigenbaum constant calculation
- Fermat numbers
- Fibonacci n-step number sequences
- Fibonacci sequence
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- File input/output
- File modification time
- File size
- File size distribution
- Filter
- Find common directory path
- Find duplicate files
- Find first and last set bit of a long integer
- Find first missing positive
- Find if a point is within a triangle
- Find limit of recursion
- Find palindromic numbers in both binary and ternary bases
- Find prime n for that reversed n is also prime
- Find prime numbers of the form n*n*n+2
- Find the intersection of a line with a plane
- Find the intersection of two lines
- Find the last Sunday of each month
- Find the missing permutation
- Find URI in text
- Find words which contains all the vowels
- Find words which contains more than 3 e vowels
- Find words which contains most consonants
- Find words which first and last three letters are equals
- Find words with alternating vowels and consonants
- Finite state machine
- First class environments
- First perfect square in base n with n unique digits
- First power of 2 that has leading decimal digits of 12
- First-class functions
- First-class functions/Use numbers analogously
- Five weekends
- Fivenum
- Fixed length records
- FizzBuzz
- Flatten a list
- Flipping bits game
- Flow-control structures
- Floyd's triangle
- Floyd-Warshall algorithm
- Forest fire
- Fork
- Formatted numeric output
- Forward difference
- Four bit adder
- Four is magic
- Four is the number of letters in the ...
- Fraction reduction
- Fractran
- Frobenius numbers
- Function composition
- Function definition
- Function frequency
- Function prototype
- Fusc sequence
G
- Galton box animation
- Gamma function
- Gapful numbers
- Gauss-Jordan matrix inversion
- Gaussian elimination
- General FizzBuzz
- Generalised floating point addition
- Generate Chess960 starting position
- Generate lower case ASCII alphabet
- Generate random chess position
- Generator/Exponential
- Generic swap
- Get system command output
- Getting the number of decimals
- Globally replace text in several files
- Gradient descent
- Gray code
- Grayscale image
- Greatest common divisor
- Greatest element of a list
- Greatest subsequential sum
- Greed
- Guess the number
- Guess the number/With feedback
- Guess the number/With feedback (player)
- GUI/Maximum window dimensions
H
- Hailstone sequence
- Hamming numbers
- Handle a signal
- Happy numbers
- Harmonic series
- Harshad or Niven series
- Hash from two arrays
- Hash join
- Haversine formula
- Hello world/Graphical
- Hello world/Line printer
- Hello world/Newbie
- Hello world/Newline omission
- Hello world/Standard error
- Hello world/Text
- Hello world/Web server
- Here document
- Heronian triangles
- Hickerson series of almost integers
- Higher-order functions
- History variables
- Hofstadter Figure-Figure sequences
- Hofstadter Q sequence
- Hofstadter-Conway $10,000 sequence
- Holidays related to Easter
- Horizontal sundial calculations
- Horner's rule for polynomial evaluation
- Host introspection
- Hostname
- Hourglass puzzle
- HTTP
- Huffman coding
- Humble numbers
I
- I before E except after C
- IBAN
- Identity matrix
- Idiomatically determine all the characters that can be used for symbols
- Idiomatically determine all the lowercase and uppercase letters
- Image noise
- Implicit type conversion
- Include a file
- Increasing gaps between consecutive Niven numbers
- Increment a numerical string
- Index finite lists of positive integers
- Infinity
- Input loop
- Input/Output for lines of text
- Input/Output for pairs of numbers
- Integer comparison
- Integer overflow
- Integer roots
- Integer sequence
- Interactive help
- Interactive programming
- Intersecting number wheels
- Introspection
- Inverted index
- Inverted syntax
- ISBN13 check digit
- Isqrt (integer square root) of X
- Iterated digits squaring
J
K
- Kahan summation
- Kaprekar numbers
- Kernighans large earthquake problem
- Keyboard input/Flush the keyboard buffer
- Keyboard input/Keypress check
- Keyboard input/Obtain a Y or N response
- Keyboard macros
- Knapsack problem/0-1
- Knapsack problem/Bounded
- Knapsack problem/Continuous
- Knapsack problem/Unbounded
- Knight's tour
- Knuth shuffle
- Knuth's algorithm S
- Knuth's power tree
- Kronecker product
- Kronecker product based fractals
L
- Lah numbers
- Langton's ant
- Largest int from concatenated ints
- Largest number divisible by its digits
- Largest proper divisor of n
- Last Friday of each month
- Last letter-first letter
- Launch rocket with countdown and acceleration in stdout
- Law of cosines - triples
- Leap year
- Least common multiple
- Left factorials
- Length of an arc between two angles
- Leonardo numbers
- Letter frequency
- Levenshtein distance
- Line circle intersection
- Linear congruential generator
- Linux CPU utilization
- List comprehensions
- List rooted trees
- Literals/Floating point
- Literals/Integer
- Literals/String
- Logical operations
- Long literals, with continuations
- Long multiplication
- Long primes
- Long year
- Longest common prefix
- Longest common subsequence
- Longest common substring
- Longest common suffix
- Longest increasing subsequence
- Longest palindromic substrings
- Longest string challenge
- Longest substrings without repeating characters
- Look-and-say sequence
- Loop over multiple arrays simultaneously
- Loop Structures
- Loops/Break
- Loops/Continue
- Loops/Do-while
- Loops/Downward for
- Loops/For
- Loops/For with a specified step
- Loops/Foreach
- Loops/Increment loop index within loop body
- Loops/Infinite
- Loops/N plus one half
- Loops/Nested
- Loops/While
- Loops/With multiple ranges
- Loops/Wrong ranges
- LU decomposition
- Lucas-Lehmer test
- Lucky and even lucky numbers
- Ludic numbers
- Luhn test of credit card numbers
- Lychrel numbers
- LZW compression
M
- MAC Vendor Lookup
- Mad Libs
- Magic 8-ball
- Magic squares of doubly even order
- Magic squares of odd order
- Magnanimous numbers
- Main step of GOST 28147-89
- Make a backup file
- Make directory path
- Man or boy test
- Mandelbrot set
- Map range
- Markov chain text generator
- Mastermind
- Matrix digital rain
- Matrix multiplication
- Matrix transposition
- Maximum triangle path sum
- Mayan numerals
- Mayan numerals\$MAYAN.REX
- Maze generation
- McNuggets problem
- MD5
- MD5/Implementation
- Memory allocation
- Memory layout of a data structure
- Menu
- Merge and aggregate datasets
- Mersenne primes
- Mertens function
- Metallic ratios
- Metaprogramming
- Metronome
- Mian-Chowla sequence
- Middle three digits
- Miller–Rabin primality test
- Mind boggling card trick
- Minimum positive multiple in base 10 using only 0 and 1
- Minkowski question-mark function
- Modified random distribution
- Modular exponentiation
- Modular inverse
- Modulinos
- Monads/Maybe monad
- Monte Carlo methods
- Monty Hall problem
- Morpion solitaire
- Morse code
- Move-to-front algorithm
- Multi-dimensional array
- Multifactorial
- Multiple distinct objects
- Multiplication tables
- Multiplicative order
- Multisplit
- Munchausen numbers
- Munching squares
- Musical scale
- Mutual recursion
- Möbius function
N
- N'th
- N-queens problem
- N-smooth numbers
- Named parameters
- Naming conventions
- Narcissist
- Narcissistic decimal number
- Native shebang
- Nautical bell
- Negative base numbers
- Neighbour primes
- Nested function
- Nested templated data
- Next highest int from digits
- Next special primes
- Nice primes
- Nim game
- Nimber arithmetic
- Non-continuous subsequences
- Non-decimal radices/Convert
- Non-decimal radices/Input
- Non-decimal radices/Output
- Nonoblock
- Nonogram solver
- Nth root
- Null object
- Number names
- Number reversal game
- Numbers divisible by their individual digits, but not by the product of their digits.
- Numbers which binary and ternary digit sum are prime
- Numbers with equal rises and falls
- Numbers with prime digits whose sum is 13
- Numeric error propagation
- Numeric separator syntax
- Numerical and alphabetical suffixes
- Numerical integration
- Numerical integration/Adaptive Simpson's method
- Numerical integration/Gauss-Legendre Quadrature
- NYSIIS
O
- Odd squarefree semiprimes
- Odd word problem
- Odd words
- Old lady swallowed a fly
- Old Russian measure of length
- One of n lines in a file
- One-dimensional cellular automata
- Operator precedence
- Optional parameters
- Orbital elements
- Order by pair comparisons
- Order disjoint list items
- Order two numerical lists
- Ordered partitions
- Ordered words
P
- Padovan n-step number sequences
- Padovan sequence
- Palindrome dates
- Palindrome detection
- Palindromic gapful numbers
- Palindromic primes
- Pancake numbers
- Pangram checker
- Paraffins
- Parametric polymorphism
- Parse an IP Address
- Parse command-line arguments
- Parsing/RPN calculator algorithm
- Parsing/RPN to infix conversion
- Parsing/Shunting-yard algorithm
- Partial function application
- Particle swarm optimization
- Partition an integer x into n primes
- Partition function P
- Pascal matrix generation
- Pascal's triangle
- Pascal's triangle/Puzzle
- Password generator
- Pathological floating point problems
- Pattern matching
- Pell's equation
- Penney's game
- Pentagram
- Perceptron
- Perfect numbers
- Perfect shuffle
- Perfect totient numbers
- Perlin noise
- Permutation test
- Permutations
- Permutations by swapping
- Permutations with repetitions
- Permutations with some identical elements
- Permutations/Derangements
- Permutations/Rank of a permutation
- Pernicious numbers
- Phrase reversals
- Pi
- Pick random element
- Pierpont primes
- Pig the dice game
- Pig the dice game/Player
- Piprimes
- Pisano period
- Playfair cipher
- Playing cards
- Plot coordinate pairs
- Pointers and references
- Poker hand analyser
- Polymorphic copy
- Polynomial long division
- Polynomial regression
- Polynomial synthetic division
- Population count
- Power set
- Pragmatic directives
- Price fraction
- Primality by trial division
- Primality by Wilson's theorem
- Prime conspiracy
- Prime decomposition
- Prime triplets
- Prime words
- Primes which sum of digits is 25
- Primes with digits in nondecreasing order
- Primorial numbers
- Print debugging statement
- Print itself
- Priority queue
- Probabilistic choice
- Problem of Apollonius
- Product of divisors
- Program name
- Program termination
- Proper divisors
- Pseudo-random numbers/PCG32
- Pseudo-random numbers/Splitmix64
- Pseudo-random numbers/Xorshift star
- Pythagorean quadruples
- Pythagorean triples
Q
R
- Ramanujan's constant
- Ramer-Douglas-Peucker line simplification
- Ramsey's theorem
- Random Latin squares
- Random number generator (device)
- Random number generator (included)
- Random numbers
- Range consolidation
- Range expansion
- Range extraction
- Ranking methods
- Rare numbers
- Rate counter
- Ray-casting algorithm
- Read a configuration file
- Read a file character by character/UTF8
- Read a file line by line
- Read a specific line from a file
- Read entire file
- Readline interface
- Real constants and functions
- Recaman's sequence
- Reduced row echelon form
- Reflection/Get source
- Reflection/List properties
- Regular expressions
- Remove duplicate elements
- Remove lines from a file
- Remove vowels from a string
- Rename a file
- Rep-string
- Repeat
- Repeat a string
- Resistor mesh
- Return multiple values
- Reverse a string
- Reverse the gender of a string
- Reverse words in a string
- Rock-paper-scissors
- Roman numerals/Decode
- Roman numerals/Encode
- Roots of a function
- Roots of a quadratic function
- Roots of unity
- Rosetta Code/Find bare lang tags
- Rosetta Code/Fix code tags
- Rosetta Code/Rank languages by number of users
- Rosetta Code/Rank languages by popularity
- Rot-13
- RPG attributes generator
- Run-length encoding
- Runge-Kutta method
- Runtime evaluation
- Runtime evaluation/In an environment
S
- S-expressions
- Safe addition
- Safe mode
- Safe primes and unsafe primes
- Sailors, coconuts and a monkey problem
- Same fringe
- Sattolo cycle
- Scope modifiers
- Scope/Function names and labels
- Search a list
- Search a list of records
- Secure temporary file
- SEDOLs
- Selective file copy
- Self numbers
- Self-describing numbers
- Semiprime
- Semordnilap
- Send email
- Separate the house number from the street name
- Sequence of non-squares
- Sequence of primes by trial division
- Sequence: nth number with exactly n divisors
- Sequence: smallest number greater than previous term with exactly n divisors
- Sequence: smallest number with exactly n divisors
- Set
- Set consolidation
- Set of real numbers
- Set puzzle
- Seven-sided dice from five-sided dice
- Sexy primes
- Shell one-liner
- Shift list elements to left by 3
- Shoelace formula for polygonal area
- Short-circuit evaluation
- Shortest common supersequence
- Show ASCII table
- Show the (decimal) value of a number of 1s appended with a 3, then squared
- Show the epoch
- Sierpinski arrowhead curve
- Sierpinski carpet
- Sierpinski triangle
- Sieve of Eratosthenes
- Simple database
- Simulate input/Keyboard
- Sine wave
- Singly-linked list/Element definition
- Singly-linked list/Element insertion
- Singly-linked list/Traversal
- Sleep
- Sleeping Beauty problem
- Smallest numbers
- Smallest power of 6 whose decimal expansion contains n
- Smallest square that begins with n
- Smarandache prime-digital sequence
- Smith numbers
- Snake and Ladder
- Solve a Hidato puzzle
- Solve a Holy Knight's tour
- Solve a Hopido puzzle
- Solve a Numbrix puzzle
- Solve the no connection puzzle
- Sort a list of object identifiers
- Sort an array of composite structures
- Sort an integer array
- Sort disjoint sublist
- Sort numbers lexicographically
- Sort stability
- Sort three variables
- Sort using a custom comparator
- Sorting algorithms/Bead sort
- Sorting algorithms/Bogosort
- Sorting algorithms/Bubble sort
- Sorting Algorithms/Circle Sort
- Sorting algorithms/Cocktail sort
- Sorting algorithms/Cocktail sort with shifting bounds
- Sorting algorithms/Comb sort
- Sorting algorithms/Counting sort
- Sorting algorithms/Cycle sort
- Sorting algorithms/Gnome sort
- Sorting algorithms/Heapsort
- Sorting algorithms/Insertion sort
- Sorting algorithms/Merge sort
- Sorting algorithms/Pancake sort
- Sorting algorithms/Patience sort
- Sorting algorithms/Permutation sort
- Sorting algorithms/Quicksort
- Sorting algorithms/Radix sort
- Sorting algorithms/Selection sort
- Sorting algorithms/Shell sort
- Sorting algorithms/Sleep sort
- Sorting algorithms/Stooge sort
- Sorting algorithms/Strand sort
- Soundex
- Sparkline in unicode
- Special characters
- Special Divisors
- Special factorials
- Special variables
- Speech synthesis
- Spelling of ordinal numbers
- Spinning rod animation/Text
- Spiral matrix
- Split a character string based on change of character
- Spoof game
- Square but not cube
- Square Form Factorization
- Square root by hand
- Square-free integers
- Stable marriage problem
- Stack
- Stack traces
- Stair-climbing puzzle
- Start from a main routine
- State name puzzle
- Statistics/Basic
- Statistics/Normal distribution
- Stem-and-leaf plot
- Stern-Brocot sequence
- Stirling numbers of the first kind
- Stirling numbers of the second kind
- Straddling checkerboard
- Strange numbers
- Strange plus numbers
- Strange unique prime triplets
- Stream merge
- String append
- String case
- String comparison
- String concatenation
- String interpolation (included)
- String length
- String matching
- String prepend
- Strip a set of characters from a string
- Strip block comments
- Strip comments from a string
- Strip control codes and extended characters from a string
- Strip whitespace from a string/Top and tail
- Strong and weak primes
- Subleq
- Subset sum problem
- Substitution cipher
- Substring
- Substring primes
- Substring/Top and tail
- Subtractive generator
- Successive prime differences
- Sudoku
- Suffixation of decimal numbers
- Sum and product of an array
- Sum and product puzzle
- Sum data type
- Sum digits of an integer
- Sum multiples of 3 and 5
- Sum of a series
- Sum of divisors
- Sum of first n cubes
- Sum of squares
- Sum of the digits of n is substring of n
- Sum to 100
- Summarize and say sequence
- Summarize primes
- Super-d numbers
- Superellipse
- Superpermutation minimisation
- Sylvester's sequence
- Symmetric difference
- System time
T
- Table creation
- Table creation/Postal addresses
- Take notes on the command line
- Tarjan
- Tau function
- Tau number
- Taxicab numbers
- Teacup rim text
- Temperature conversion
- Terminal control/Clear the screen
- Terminal control/Coloured text
- Terminal control/Cursor movement
- Terminal control/Cursor positioning
- Terminal control/Dimensions
- Terminal control/Display an extended character
- Terminal control/Hiding the cursor
- Terminal control/Inverse video
- Terminal control/Positional read
- Terminal control/Preserve screen
- Terminal control/Ringing the terminal bell
- Ternary logic
- Test a function
- Test integerness
- Text between
- Text completion
- Text processing/1
- Text processing/2
- Text processing/Max licenses in use
- Textonyms
- The ISAAC Cipher
- The Name Game
- The Twelve Days of Christmas
- Thue-Morse
- Tic-tac-toe
- Time a function
- Tokenize a string
- Tokenize a string with escaping
- Tonelli-Shanks algorithm
- Top rank per group
- Topic variable
- Topological sort
- Topological sort/Extracted top item
- Topswops
- Total circles area
- Totient function
- Towers of Hanoi
- Trabb Pardo–Knuth algorithm
- Transportation problem
- Tree traversal
- Trigonometric functions
- Triplet of three numbers
- Truncatable primes
- Truncate a file
- Truth table
- Twelve statements
- Twin primes
- Two bullet roulette
- Two identical strings
- Two sum
- Type detection
U
- Ulam numbers
- Ulam spiral (for primes)
- Unbias a random generator
- Undefined values
- Unicode strings
- Unicode variable names
- Unique characters
- Unique characters in each string
- Unit testing
- Universal Turing machine
- Unix/ls
- Unprimeable numbers
- Untouchable numbers
- Untrusted environment
- UPC
- Update a configuration file
- URL decoding
- URL encoding
- User input/Graphical
- User input/Text
- Using a speech engine to highlight words
V
- Validate International Securities Identification Number
- Vampire number
- Van der Corput sequence
- Van Eck sequence
- Variable size/Get
- Variable size/Set
- Variable-length quantity
- Variables
- Variadic function
- Vector
- Vector products
- Verify distribution uniformity/Chi-squared test
- Verify distribution uniformity/Naive
- Video display modes
- Vigenère cipher
- Visualize a tree
- VList
- Vogel's approximation method
W
- Walk a directory/Non-recursively
- Walk a directory/Recursively
- Water collected between towers
- Weird numbers
- Wieferich primes
- Wireworld
- Word break problem
- Word frequency
- Word ladder
- Word wheel
- Word wrap
- Words containing "the" substring
- Words from neighbour ones
- World Cup group stage
- Write entire file
- Write float arrays to a text file
- Write language name in 3D ASCII
- Write to Windows event log
- Execution method/Interpreted
- Garbage collection/Allowed (and in most versions of REXX, it is automatic, but garbage collection isn't mandated).
- Parameter passing/By value
- Typing/Safe
- Typing/Strong
- Typing/Compatibility/Nominative
- Typing/Expression/Inferred
- Typing/Checking/Dynamic
- Typing/Untyped
- Programming Languages
- WikipediaSourced