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real, dimension(100) :: b
integer(int8), dimension(100) :: a
call random_number(b)
a = b*256 - 128Fortran has no "byte" type per se, but it has (if supported) an integer type with 8 bits, which has the kind from iso_fortran_env. The intrinsic subroutine random_number returns random numbers in the range of [0..1[.
new Random().nextBytes(a);For performance, consider reusing the Random instance
for b in a do b := random(256);my $s = random_bytes( $number_of_bytes );
my @a = split //, $s;Perl doesn't have byte arrays per se. Bytes::Random from CPAN will generate a string of random bytes. Splitting that on an empty regex in list context will return the bytes in a list.
a[:] = random.randbytes(len(a))If array a exists and its content is to be replaced.