Perl 6 Deep Dive

String concatenation operator

The ~ operator concatenates two strings, as follows. 

say 'a' ~ 'b'; # ab

If the operands are not strings, they are converted to strings before the operation:

say 10 ~ 20;

This prints the 1020 string.

A form with assignment may also be quite useful in some applications:

my $string = 'Hello, ';$string ~= 'World!';say $string; # Hello, World!