#
Fortran Wiki

log

## Description

`log(x)`

computes the natural logarithm of `x`

, i.e. the logarithm to the base $e$.

## Standard

FORTRAN 77 and later

## Class

Elemental function

## Syntax

`result = log(x)`

## Arguments

`x`

- The type shall be `real`

or `complex`

.

## Return value

The return value is of type `real`

or `complex`

. The kind type parameter is the same as `x`

. If `x`

is `complex`

, the imaginary part $\omega$ is in the range $-\pi \lt \omega \leq \pi$.

## Example

```
program test_log
real :: x = 2.7182818284590451_8
complex :: z = (1.0, 2.0)
x = log(x)
z = log(z)
end program test_log
```

Revised on March 1, 2023 13:12:32
by

vmagnin
(86.67.213.90)
(927 characters / 0.0 pages)