num::traits

Function signum

Source 
pub fn signum<T>(value: T) -> T
where
    T: Signed,
Expand description

Returns the sign of the number.

For f32 and f64:

  • 1.0 if the number is positive, +0.0 or INFINITY
  • -1.0 if the number is negative, -0.0 or NEG_INFINITY
  • NaN if the number is NaN

For signed integers:

  • 0 if the number is zero
  • 1 if the number is positive
  • -1 if the number is negative