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Manual Reference Pages  - digits (3)

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NAME

digits(3f) - [FORTRAN:INTRINSIC:NUMERIC MODEL] Significant digits function

SYNTAX

result = digits(x)

DESCRIPTION

digits(x) returns the number of significant digits of the internal model representation of X. For example, on a system using a 32-bit floating point representation, a default real number would likely return 24.

ARGUMENTS

X	The type may be INTEGER or REAL.

RETURN VALUE

The return value is of type INTEGER.

EXAMPLE

Sample program:

    program demo_digits
    implicit none
        integer :: i = 12345
        real :: x = 3.143
        doubleprecision :: y = 2.33d0
        print *,’default integer:        ’, digits(i)
        print *,’default real:           ’, digits(x)
        print *,’default doubleprecision:’, digits(y)
    end program demo_digits

Typical Results:

    default integer:                  31
    default real:                     24
    default doubleprecision:          53

STANDARD

[[Fortran 95]] and later

CLASS

[[Inquiry function]]

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digits (3)

March 11, 2021

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