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Answer: How do I insert characters at certain positions in a string?

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Q&A > strings > How do I insert characters at certain positions in a string? contributed by Anonymous Monk

If you do not want to replace the character you can set the substring length to zero.
my $padded = 'ABCDEFG'; substr($padded, 2, 0) = '1'; substr($padded, 1, 0) = '2';
This will result in 'A2B1CDEFG'

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