github.com/ltltlt/go-source-code@v0.0.0-20190830023027-95be009773aa/math/abs.go (about)

     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  	return Float64frombits(Float64bits(x) &^ (1 << 63))
    14  }