How do I convert a binary string to a number in Perl?

Question

How can I convert the binary string $x_bin=\"0001001100101\" to its numeric value $x_num=613 in Perl?

Answer 1

Actually you can just stick '0b' on the front and it's treated as a binary number.

perl -le 'print 0b101'
5

But this only works for a bareword.