dc

dc [file]

An interactive desk calculator program that performs arbitrary-precision integer arithmetic (input may be taken from a file). Normally you don't run dc directly, since it's invoked by bc (see bc). dc provides a variety of one-character commands and operators that perform arithmetic; dc works like a Reverse Polish calculator; therefore, operators and commands follow the numbers they affect. Operators include + - / * % ^ (as in C, although ^ means exponentiation); some simple commands include:

p	Print current result.
q	Quit dc.
c	Clear all values on the stack.
v	Take square root.
i	Change input base; similar to bc's ibase.
o	Change output base; similar to bc's obase.
k	Set scale factor (number of digits after decimal); similar to bc's scale.
!	Remainder of line is a Unix command.

Examples

3 2 ^ p	Evaluate 3 squared, then print result
9 
8 * p	Current value (9) times 8, then print result
72 
47 - p	Subtract 47 from 72, then print result
25
v p	Square root of 25, then print result
5
2 o p	Display current result in base 2
101

Note: spaces are not needed except between numbers.