Min

Min[x1, x2, ...] yields the numerically smallest of the xi.

Min[{x1, x2, ...}, {y1, ...}, ...] yields the smallest element of any of the lists.

Examples

Minimum of numbers:

Min[3, 1, 4, 1, 5, 9]
(* 1 *)

Minimum of a list:

Min[{-5, 3, 7, -2}]
(* -5 *)

Please visit the official Wolfram Language Reference for more details.