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How to get all the possible Substrings of a String in Perl - Step by Step Examples

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How to get all the possible Substrings of a String in Perl ?

Answer

To get all possible substrings of a string in Perl, you can use nested loops to iterate through each combination of start and end indices.

✐ Examples

1 All Substrings of 'Hello'

In this example,

We create a variable named $str with a value of 'Hello'.
We initialize an array named @substrings to store all substrings.
We use nested loops to iterate through each possible start and end index combination.
For each combination, we extract the substring using substr function and add it to the @substrings array.
Finally, we print the @substrings array.

Perl Program

my $str = 'Hello';
my @substrings;
for my $i (0..length($str)-1) {
    for my $j ($i+1..length($str)) {
        push @substrings, substr($str, $i, $j-$i);
    }
}
print "All substrings: @substrings\n";

Output

All substrings: H He Hel Hell Hello e el ell ello l ll llo lo o

Summary

In this tutorial, we learned How to get all the possible Substrings of a String in Perl language with well detailed examples.

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