Negate a number: set positive a negative number, and vice versa.
Shortcut of ?x = -?x
This statement returns no value, it directly updates the given variable.
negate ?a
?a variable
Source ?x = 10 print "1) ?x" negate ?x print "2) ?x" negate ?x print "3) ?x"Execution 1) 10 2) -10 3) 10