ucfirst - Perldoc Browser

#ucfirst EXPR

#ucfirst

Returns the value of EXPR with the first character in uppercase (Unicode calls this titlecase). If EXPR is omitted, ucfirst uses $_.

my $str = ucfirst("hello world!"); # "Hello world!"

This function behaves the same way under various pragmas, such as in a locale, as lc does.

Note: This is the internal function implementing the \u escape in double-quoted strings.

my $str = "\uperl\E is great"; # "Perl is great"

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