Technical Briefs

ROHAN help Files

calc

calc, a command line calculator, is a program that evaluates mathematical expressions. An expression is any decimal number in integer or real format. It may also be a binary, octal or hexidecimal integer prefixed by, respectively, b, o, or h, or an ASCII character, prefixed by @. An expression is also any expression preceded by one of the following:

               sin       log       - (unary minus)
               cos       ln        + (unary plus)
               tan       sqrt      ~ (one's complement)
               atan      exp

or any two expressions separated by one of the following operators:

               Exponentiation:     :
               Multiplication:     *    x    X
                                   (none: implied multiplication)
               Division:           /
               Modulo:             %
               Addition:           +
               Subtraction:        -
               Left shift:         <
               Right shift:        >
               Bitwise AND:        &
               Bitwise XOR:        ^
               BitWise OR:         |

An expression is any expression preceded by an opening delimeter:

               {    [    (

and followed by a closing delimiter:

               }    ]    )

The special symbols pi and PI are also valid expressions. So is prev which returns the value of the previous equation (multiple-expression mode only).

If the expression is omitted from the command line, then the program will be in multiple-expression mode and repeatedly read expressions from the standard input until it encounters an empty line or an end of file.