Source file src/pkg/math/abs.go

     1	// Copyright 2009 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	package math
     6	
     7	// Abs returns the absolute value of x.
     8	//
     9	// Special cases are:
    10	//	Abs(±Inf) = +Inf
    11	//	Abs(NaN) = NaN
    12	func Abs(x float64) float64
    13	
    14	func abs(x float64) float64 {
    15		switch {
    16		case x < 0:
    17			return -x
    18		case x == 0:
    19			return 0 // return correctly abs(-0)
    20		}
    21		return x
    22	}