In Cool§

See primary documentation in context for routine tclc

sub tclc(Str(Cool))
method tclc()

Coerces the invocant (or in sub form, its argument) to Str, and returns it with the first letter case-folded to title case (or where not available, upper case), and the rest of the string case-folded to lower case.

say 'abC'.tclc;     # OUTPUT: «Abc␤»

In Str§

See primary documentation in context for routine tclc

multi        tclc(Str:D  --> Str:D)
multi method tclc(Str:D: --> Str:D)

Turns the first character to title case, and all other characters to lower case

In Allomorph§

See primary documentation in context for method tclc

method tclc(Allomorph:D:)

Calls Str.tclc on the invocant's Str value.