Simplified Common Lisp reference
max
Symbol class: Mathematics, Arithmetics, Logic and Comparisons
Syntax:
Symbol type: function
maxnumbers(one or more) => numeric value
Argument description:
numbers comparable numbers

MAX function returns the maximal number from arguments. Type of resulting number may be different when arguments multiple precision numbers.

(max 1 3 2) => 3
(max 4) => 4
(= 3.0 (max 3 1 3.0 2 3.0d0)) => T
Function indexFull documentation for max (HyperSpec)