You can do bit-wise or using the | operator: 
my $a6 = 0b10100101;
my $a7 = $a6 | 0b0000010;
printf "dec: $a7, hex: %x\n",$a7

[download]
see also perlop's section on bitwise or

update: ignore the variable names :-)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: How may I set a bit or change (10100101 to 10100111)? by Joost
in thread How may I set a bit or change (10100101 to 10100111)? by unixhome

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