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.