Category:Dc: Difference between revisions
dc commands
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{{language}}dc is the unix desktop calculator. It uses a reverse polish notation and is turing complete.
Commands in POSIX dc
number : push a number
+ - / * % ^ : arithmetic operations
sx Sx : pop the stack and save or push it to register x
lx Lx : copy | pop the register x to main stack.
d : duplicate top of the stack
p : print top of the stack
P : pop and print String
f : show stack
q : exit (drop execution stack by 2)
Q : drop execution stack by top of the stack number
x : execute dc commands on top of the stack
X : replace top of stack by its scale factor.
[...] : string notation
<x >x =x : compare 2 elements at top of the stack, and execute register x
v : square root
! : shell command
c : clear
i : set input radix from top of stack
I : push input base on the top of the stack.
o : set output radix from top of stack
O : push output base on the top of the stack.
k : set scale factor
K : get current scale factor
z : get the current stack level.
Z : get the character length of element at top of stack
? : read input and execute.
Y : debug information
a b ;r : store r[b] = a (r is register)
a ;r : retrieve r[b]
GNU Extensions
n : print value without a new line
| : arithmetic - modular exponentiation
r : swap the top two elements
a : asciify
!>r !<r !=r : execute contents of register x based on comparison
X : pushes the number of fractional digits
# : comment
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