sign

This function returns whether a number is positive, negative or neither and returns 1, -1, or 0, respectively.

For example, sign(458) will return 1, sign(-5) will return -1 and sign(0) will return 0.

Usage Notes

• sign(NaN) will always return -1.

Syntax:

sign(n);

Returns:

Real

Example:

y += sign(y - mouse_y);

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