// Copyright 2010 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 cmplx | |

import "math" | |

// Phase returns the phase (also called the argument) of x. | |

// The returned value is in the range [-Pi, Pi]. | |

func Phase(x complex128) float64 { return math.Atan2(imag(x), real(x)) } |