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Asked: 2026-05-16T15:31:08+00:00

I was wondering when one should use s/// over tr/// when working with regular

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I was wondering when one should use s/// over tr/// when working with regular expressions in Perl?

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  1. Editorial Team

    s/// is for substitution:

    $string =~ s/abc/123/;

    This will replace the first “abc” found in $string with “123”.

    tr/// is for transliteration:

    $string =~ tr/abc/123/;

    This will replace all occurrences of “a” within $string with “1”, all occurrences of “b” with “2”, and all occurrences of “c” with “3”.

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