(abs number)

Specify that number's distance from 0 (zero), disregarding direction (positive or negative).

This function returns the absolute value of the number. You can use a real number or an integer. This function takes exactly one argument.

Examples

Code	Returns
(abs 56)	56
(abs -2.3)	2.30000
(abs -49)	49

NOTES

Use this function to convert a negative number to a positive number, or to ensure the number is positive.
When you need to make sure a number is negative, first apply the abs function, and then subtract the number from 0.

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(minusp number)

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language

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