Fortran Wiki
log

Skip the Navigation Links | Home Page | All Pages | Recently Revised | Authors | Feeds | Export |

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) ! will yield (approximately) 1
 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)

Edit | Back in time (3 revisions) | See changes | History | Views: Print | TeX | Source | Linked from: Intrinsic procedures