Function sign 

pub fn sign(x: f64) -> f64

sign(x)

Native Function

The sign function returns only one of three possible values: −1, 0 or 1.

Examples

use mathlab::math::sign;
assert_eq!(sign(-9.0), -1.0);
assert_eq!(sign(9.0), 1.0);
assert_eq!(sign(--9.5), 1.0);
assert_eq!(sign(6.0 - 15.0), -1.0);
assert_eq!(sign(0.0), 0.0);
assert_eq!(sign(0.0 / 0.0), 0.0);

End Fun Doc