max

;; `max` returns the largest of its arguments
user=> (max 1 2 3 4 5)  
5

;; regardless of order of those arguments
user=> (max 5 4 3 2 1)
5

user=> (max 100)
100

;; If elements are already in a sequence, use apply
user=> (apply max [1 2 3 4 3])
4
user=> (apply max '(4 3 5 6 2))
6

user> (reduce max [1 2 3 4 5 6 7 6 5 4 3])
7