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If a string in Perl 5 passes looks_like_number, it might as well be a number. For instance,
my $s = "10" + 5;
results in $s being assigned 15.
Are there any cases where a string does not behave like its numeric equivalent would?
When dealing with bitwise operators.
123 ^ 456is 435, but"123" ^ "456"is"\x05\x07\x05". The bitwise operators work numerically if either operand is a number.