Course of Raku / Regexes and grammars / Regexes / Substitution and replacement / Exercises / Lower-case letters

Solution: Lower-case letters

Here is a possible solution to the task.

Code

my $s = 'RAKU';
$s ~~ tr/A..Z/a..z/;
say $s;

🦋 You can find the source code in the file upcase-letters.raku.

Output

raku

Comments

1. tr/// maps each character in the first range to the character at the same position in the second.

2. Here the ranges run from the uppercase letters to the lowercase ones, so every uppercase letter is replaced by its lowercase partner — the opposite direction to upper-casing.

Course navigation

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