`(gcd n[1] ...)`procedure`(lcm n[1] ...)`procedureThese procedures return the greatest common divisor or least common multiple of their arguments. The result is always non-negative.

(gcd 32 -36) ===> 4 (gcd) ===> 0 (lcm 32 -36) ===> 288 (lcm 32.0 -36) ===> 288.0 ; inexact (lcm) ===> 1