Multiplying Binary Numbers in Python

Question

Lets say I have the binary number 0b110, which is 6, and I want to multiply the number by 3, to get 18 which is 0b10010. How would I do that in Python, I tried multiplying it normally, but it didn't work...

"I tried multiplying it normally" - not sure what you mean by that. First off, do you know how to multiply in binary (without any specific language)? — Widor
– Widor, Commented Feb 21, 2012 at 17:41
@skytreader: binary numbers are ints, decimal numbers are ints, Xary numbers are ints, no need to cast. — Niklas B.
– Niklas B., Commented Feb 21, 2012 at 17:42
@NiklasB. Fair point. I was thinking OP wanted results displayed in 0s and 1s representation though. Hence, the typecasting. — skytreader
– skytreader, Commented Feb 21, 2012 at 17:44
What did you try? What was your expected output? What was your actual output? — Russell Borogove
– Russell Borogove, Commented Feb 21, 2012 at 18:17

Sven Marnach · Accepted Answer · 2012-02-21 17:40:59Z

15

>>> 0b110 * 0b11
18
>>> bin(0b110 * 0b11)
'0b10010'

answered Feb 21, 2012 at 17:40

Sven Marnach

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Niklas B. Over a year ago

Haha, this is easily earned reputation :P

NPE · Accepted Answer · 2012-02-21 17:41:56Z

3

In [2]: 0b110 * 3
Out[2]: 18

In [3]: bin(0b110 * 3)
Out[3]: '0b10010'

answered Feb 21, 2012 at 17:41

NPE

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