Arithmetic Functions Reference (AutoLISP)

The following table provides summary descriptions of the AutoLISP arithmetic functions.

Arithmetic functions
Function	Description
(+ [number number ...])	Returns the sum of all numbers
(- [number number ...])	Subtracts the second and following numbers from the first and returns the difference
(* [number number ...])	Returns the product of all numbers
(/ [number number ...])	Divides the first number by the product of the remaining numbers and returns the quotient
(~ int)	Returns the bitwise NOT (1's complement) of the argument
(1+ number)	Returns the argument increased by 1 (incremented)
(1- number)	Returns the argument reduced by 1 (decremented)
(abs number)	Returns the absolute value of the argument
(atan num1 [num2])	Returns the arctangent of a number in radians
(cos ang)	Returns the cosine of an angle expressed in radians
(exp number)	Returns the constant e (a real) raised to a specified power (the natural antilog)
(expt base power)	Returns a number raised to a specified power
(fix number)	Returns the conversion of a real into the nearest smaller integer
(float number)	Returns the conversion of a number into a real
(gcd int1 int2)	Returns the greatest common denominator of two integers
(log number)	Returns the natural log of a number as a real
(logand [int int ...])	Returns the result of the logical bitwise AND of a list of integers
(logior [int int ...])	Returns the result of the logical bitwise inclusive OR of a list of integers
(lsh [int numbits])	Returns the logical bitwise shift of an integer by a specified number of bits
(max [number number ...])	Returns the largest of the numbers given
(min [number number ...])	Returns the smallest of the numbers given
(minusp number)	Verifies that a number is negative
(rem [num1 num2 ...])	Divides the first number by the second, and returns the remainder
(sin ang)	Returns the sine of an angle as a real expressed in radians
(sqrt number)	Returns the square root of a number as a real
(zerop number)	Verifies that a number evaluates to zero