Apropos

gcdFunction

    Syntax

    gcd &rest integers greatest-common-denominator

    Arguments and Values

    integer — an integer.

    greatest-common-denominator — a non-negative integer.

    Description

    Returns the greatest common divisor of integers. If only one integer is supplied, its absolute value is returned. If no integers are given, gcd returns 0, which is an identity for this operation.

    Examples
    (gcd)  0 
    (gcd 60 42)  6 
    (gcd 3333 -33 101)  1 
    (gcd 3333 -33 1002001)  11 
    (gcd 91 -49)  7 
    (gcd 63 -42 35)  7 
    (gcd 5)  5 
    (gcd -4)  4
    Exceptional Situations

    Should signal an error of type type-error if any integer is not an integer.

    See Also

    lcm

    Notes

    For three or more arguments,

    (gcd b c ... z)  (gcd (gcd a b) c ... z)