External module "math/base/special/signum/docs/types/index.d"

Export assignment signum

• signum(x: number): number

• Evaluates the signum function for a double-precision floating-point number.

  Notes

  • Table of results:

    Value	Sign
    x > 0	+1
    x < 0	-1
    0	0
    -0	-0
    NaN	NaN

  Parameters

  • x: number

    input value

  Returns number

  function value

  Example

  var sign = signum( -5.0 );
  // returns -1.0

  Example

  var sign = signum( 5.0 );
  // returns 1.0

  Example

  var sign = signum( -0.0 );
  // returns -0.0

  Example

  var sign = signum( 0.0 );
  // returns 0.0

  Example

  var sign = signum( NaN );
  // returns NaN