Format
sign(A)
Returns
1 if A > 0, -1 if A < 0, 0 if A == 0
Args
A: A number or a vector.
Returns the sign of A. If used with a vector, a new vector is returned where sign() has been applied to each component.
usr << sign(20) // outputs 1
usr << sign(0) // outputs 0
usr << sign(-3) // outputs -1