# Fortran Wiki cosh

## Description

cosh(x) computes the hyperbolic cosine of x.

## Standard

FORTRAN 77 and later, for a complex argument Fortran 2008 or later

## Class

Elemental function

## Syntax

x = cosh(x)

## Arguments

• x - The type shall be real or complex.

## Return value

The return value has same type and kind as x. If x is complex, the imaginary part of the result is in radians. If x is real, the return value has a lower bound of one, \\cosh(x) \\geq 1.

## Example

program test_cosh
real(8) :: x = 1.0_8
x = cosh(x)
end program test_cosh