Function sign 

pub fn sign(x: number) -> number

Available on crate feature extended only.

Returns the sign of a number: 1, −1 or 0. NaN is returned unchanged. Extended library — feature extended (from extended.lua). From Rust f64::signum.

Examples

print(math.sign(9))       --> 1
print(math.sign(-0.5))    --> -1
print(math.sign(0))       --> 0

See also

abs