C Library Functions - random_string (3)

NAME

random_string(3f) - [M_random] create random string composed of provided characters of specified length (LICENSE:MIT)

Synopsis
Description
Options
Returns
Examples
Author
License

SYNOPSIS

function random_string(chars,length) result(out)

     character(len=*),intent(in)     :: chars
     integer,intent(in)              :: length
     character(len=:),allocatable    :: out

DESCRIPTION

Given a set of characters and a length, generate a random string of the specified length composed of the given set of characters.

OPTIONS

chars list of characters to generate random string with

length number of characters to place in output string

RETURNS

out string of LENGTH characters randomly filled with characters from CHARS

EXAMPLES

Sample program:

    program demo_random_string
    use M_random, only : random_string, init_random_seed_by_dat
       character(len=64) :: hexstring
       ! use date and time to create a seed for calling random_seed(3f)
       call init_random_seed_by_dat()
       hexstring=random_string(’0123456789abcdef’,len(hexstring))
       ! write random hexadecimal value for use
       ! as something like an X11 authorization key
       write(*,’(a)’)hexstring
    end program demo_random_string

Results

2363a3589736e23be0137ec7ebc9d74297a963f27958a176daea3dd850ed8487

AUTHOR

John S. Urban

LICENSE

MIT License

Nemo Release 3.1

random_string (3)

June 29, 2025

Generated by manServer 1.08 from 0a972a2b-4da5-4c8f-a808-e9f0106639ea using man macros.

chars	list of characters to generate random string with
length	number of characters to place in output string