Category:AWK
This programming language may be used to instruct a computer to perform a task.
Execution method:  Interpreted 

See Also: 

AWK is a small but powerful programming language that can process and convert text files. AWK is part of every Unixderived system.
Each AWK program consists of patternaction statements.
The program reads each input line, checks lines against patterns, and runs matching actions.
For programs that never read input lines, the entire program can be one BEGIN { ... }
block.
 List users who have /bin/ksh as a shell.<lang awk>$ awk F: '$7 == "/bin/ksh" { print $1 }' /etc/passwd</lang>
AWK has only three types of variables: they are strings, floatingpoint numbers, and associative arrays (where every array index is a string). Conversion between strings and numbers is automatic. AWK also has regular expressions, which appear in many AWK programs. There are a few builtin functions, like cos() and sprintf().
 Find average line length.<lang awk>$ awk '{ cnt += length($0) } END { print cnt / NR }' /etc/rc</lang>
The name "AWK" comes from the initials of Alfred Aho, Peter Weinberger and Brian Kernighan: they invented AWK during the 1970s. A few decades later, Kernighan continues to maintain the reference implementation of AWK.
Links
 awk(1) manual page, short and brief
 gawk GNU awk manual
 AWK in Wikipedia
 AWK Community Portal
OnlineExecution
 ideone.com  gawk, mawk (both are kept up to date)
Todo
Subcategories
This category has the following 4 subcategories, out of 4 total.
@
 AWK Implementations (8 P)
 AWK User (68 P)
 Awk User (1 P)
Pages in category "AWK"
The following 200 pages are in this category, out of 709 total.
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 File modification time
 File size
 Filter
 Find adjacent primes which differ by a square integer
 Find common directory path
 Find first missing positive
 Find limit of recursion
 Find minimum number of coins that make a given value
 Find prime n such that reversed n is also prime
 Find prime numbers of the form n*n*n+2
 Find square difference
 Find squares n where n+1 is prime
 Find the intersection of two lines
 Find the last Sunday of each month
 Find the missing permutation
 Find words which contain the most consonants
 Find words which contains all the vowels
 Find words which contains more than 3 e vowels
 Find words whose first and last three letters are equal
 Find words with alternating vowels and consonants
 First 9 prime Fibonacci number
 Five weekends
 Fixed length records
 FizzBuzz
 Flowcontrol structures
 Floyd's triangle
 Formatted numeric output
 Forward difference
 Four is magic
 Four sides of square
 Frobenius numbers
 Function definition
 Function frequency
 Fusc sequence
G
 Gamma function
 Gapful numbers
 General FizzBuzz
 Generate lower case ASCII alphabet
 Generate random numbers without repeating a value
 Generic swap
 Get system command output
 Getting the number of decimal places
 Giuga numbers
 Globally replace text in several files
 Goldbach's comet
 Gray code
 Greatest common divisor
 Greatest element of a list
 Greatest subsequential sum
 Greyscale bars/Display
 Guess the number
 Guess the number/With feedback
H
 Hailstone sequence
 Halt and catch fire
 Hamming numbers
 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
 Hex words
 Hickerson series of almost integers
 Hofstadter FigureFigure sequences
 Hofstadter Q sequence
 HofstadterConway $10,000 sequence
 Horizontal sundial calculations
 Horner's rule for polynomial evaluation
 Hostname
 Hourglass puzzle
 HTTP
 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
 Implicit type conversion
 Include a file
 Increasing gaps between consecutive Niven numbers
 Increment a numerical string
 Infinity
 Input loop
 Input/Output for lines of text
 Input/Output for pairs of numbers
 Integer comparison
 Integer sequence
 Interactive help
 Introspection
 ISBN13 check digit
 Iterated digits squaring
K
L
 Lah numbers
 Langton's ant
 Largest difference between adjacent primes
 Largest five adjacent number
 Largest int from concatenated ints
 Largest number divisible by its digits
 Largest palindrome product
 Largest prime factor
 Largest product in a grid
 Largest proper divisor of n
 Last Friday of each month
 Last list item
 Law of cosines  triples
 Leap year
 Least common multiple
 Left factorials
 Length of an arc between two angles
 Leonardo numbers
 Letter frequency
 Levenshtein distance
 Linux CPU utilization
 Literals/Floating point
 Literals/Integer
 Literals/String
 Logical operations
 Long literals, with continuations
 Long multiplication
 Long year
 Longest common prefix
 Longest common suffix
 Longest string challenge
 Lookandsay sequence
 Loop over multiple arrays simultaneously
 Loops/Break
 Loops/Continue
 Loops/Dowhile
 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
 LucasLehmer test
 Luhn test of credit card numbers
 LZW compression
M
 Mad Libs
 Magic 8ball
 Magic constant
 Magic numbers
 Magic squares of doubly even order
 Magic squares of odd order
 Magnanimous numbers
 Make a backup file
 Make directory path
 Mandelbrot set
 Map range
 Matrix multiplication
 Matrix transposition
 Matrix with two diagonals
 Maximum difference between adjacent elements of list
 Maximum triangle path sum
 Maze generation
 McNuggets problem
 Menu
 Merge and aggregate datasets
 Mersenne primes
 Metronome
 MianChowla sequence
 Middle three digits
 Minimum multiple of m where digital sum equals m
 Minimum number of cells after, before, above and below NxN squares
 Minimum numbers of three lists
 Minimum primes
 Modular inverse
 Monte Carlo methods
 Monty Hall problem
 Morse code
 Mosaic matrix