8.24 ATAND — Arctangent function, degrees

Description:

ATAND(X) computes the arctangent of X in degrees (inverse of TAND — Tangent function, degrees).

Standard:

Fortran 2023

Class:

Elemental function

Syntax:

RESULT = ATAND(X)

Arguments:

`X`	The type shall be `REAL`; if `Y` is present, `X` shall be REAL.
`Y`	The type and kind type parameter shall be the same as `X`.

Return value:

The return value is of the same type and kind as X. The result is in degrees and lies in the range -90 \leq \Re \atand(x) \leq 90.

Example:

program test_atand
  real(8) :: x = 2.866_8
  x = atand(x)
end program test_atand

Specific names:

Name	Argument	Return type	Standard
`ATAND(X)`	`REAL(4) X`	`REAL(4)`	Fortran 2023
`DATAND(X)`	`REAL(8) X`	`REAL(8)`	GNU extension

See also:

© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-14.2.0/gfortran/ATAND.html