blob: eb3e4c72b32914654d17981b24a4bac4de5ca901 [file] [log] [blame]
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package math
// Abs returns the absolute value of x.
//
// Special cases are:
// Abs(+Inf) = +Inf
// Abs(-Inf) = +Inf
// Abs(NaN) = NaN
func Abs(x float64) float64 {
switch {
case x < 0:
return -x
case x == 0:
return 0 // return correctly abs(-0)
}
return x
}