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C Library Functions  - atand (3)

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NAME

atand(3f) - [M_units:TRIGONOMETRY] calculate arctangent of value in degrees (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Example
Author
License

SYNOPSIS

elemental real function atand(value)

     class(*),intent(in) :: value

DESCRIPTION

Calculate arctangent of input value in degrees. It calls atan(3f) and converts the output to degrees from radians.

OPTIONS

value	any standard scalar value supported by anyscalar_to_double(3f)

EXAMPLE

Sample program:

   program demo_atand
   use M_units, only :  atand, tand
   implicit none
      write(*, *)       tand(0.0),tand(45.0),tand(120.0),tand(180.0),tand(720.0)
      write(*, *)atand([tand(0.0),tand(45.0),tand(120.0),tand(180.0),tand(720.0) ])
   end program demo_atand

Results:

      0.00000000       1.00000000      -1.73205078      -1.22464685E-16  -4.89858741E-16
      0.00000000       45.0000000      -60.0000000      -7.01670955E-15  -2.80668382E-14

AUTHOR

John S. Urban

LICENSE

Public Domain

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Nemo Release 3.1

atand (3)

February 23, 2025

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