MAX _ _ _ _ _ _ _ _ _ _ _ _ operator
The operator max is an n-ary prefix operator, which returns the largest value in its arguments.
max(<expression>{,<expression>}*)
<expression> must evaluate to a number. max of an empty list returns 0.
max(4,6,10,-1); 10 <<a := 23;b := 2*a;c := 4**2;max(a,b,c)>>; 46 max(-5,-10,-a); -5