sign


描述

This function returns whether a number is positive, negative or neither and returns 1, -1, 0 respectively. For example - sign(458) will return 1, sign(-5) will return -1 and sign(0) will return 0.


语法:

sign(n);


参数 描述
n The number to get the sign of.


Returns:

整数


例如:

y += sign(y - mouse_y);

The above code will add 1, -1 or 0 onto y depending on the result of y - mouse_y.