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go/src/math/abs.go
Russ Cox c007ce824d build: move package sources from src/pkg to src
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
2014-09-08 00:08:51 -04:00

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Go

// 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(NaN) = NaN
func Abs(x float64) float64
func abs(x float64) float64 {
switch {
case x < 0:
return -x
case x == 0:
return 0 // return correctly abs(-0)
}
return x
}