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Manual Reference Pages  - log10 (3fortran)

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NAME

LOG10(3) - [MATHEMATICS] Base 10 or common logarithm

SYNOPSIS

result = log10(x)

         elemental real(kind=KIND) function log10(x)

          real(kind=KIND),intent(in) :: x

CHARACTERISTICS

o	X may be any kind of real value
o	the result is the same type and characteristics as X.

DESCRIPTION

LOG10(3) computes the base 10 logarithm of X. This is generally called the "common logarithm".

OPTIONS

o	X : A real value > 0 to take the log of.

RESULT

The logarithm to base 10 of X

EXAMPLES

Sample program:

    program demo_log10
    use, intrinsic :: iso_fortran_env, only : real32, real64, real128
    implicit none
    real(kind=real64) :: x = 10.0_real64

       x = log10(x)
       write(*,’(*(g0))’)’log10(’,x,’) is ’,log10(x)

       ! elemental
       write(*, *)log10([1.0, 10.0, 100.0, 1000.0, 10000.0, &
                         & 100000.0, 1000000.0, 10000000.0])

    end program demo_log10

Results:

     > log10(1.000000000000000) is .000000000000000
     >   0.0000000E+00   1.000000       2.000000       3.000000       4.000000
     >    5.000000       6.000000       7.000000

STANDARD

FORTRAN 77

SEE ALSO

o	exp(3) - Base-e exponential function
o	gamma(3) - Gamma function, which yields factorials for positive whole numbers
o	hypot(3) - Returns the Euclidean distance - the distance between a point and the origin.
o	log(3) - Natural logarithm
o	log_gamma(3) - Logarithm of the absolute value of the Gamma function

Fortran intrinsic descriptions

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