# what does bit wise operator '&' does here ?

posted 4 years ago

what does bit wise operator '&' does here ? addition, substraction, division, modulus or what ?

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posted 4 years ago

It does a bit-wise AND.

So, if

So what that's doing is testing if the last binary digit is 1 or not. In this case, it's equivalent to testing whether the number is even or not, and so you could do the equivalent as

So, if

`no`is (in binary) 10111001 (for instance), then`i & 1`would be`10111001 & 00000001`, which is 00000001, or 1. The last digit is the only one that is 1 in both numbers.So what that's doing is testing if the last binary digit is 1 or not. In this case, it's equivalent to testing whether the number is even or not, and so you could do the equivalent as

`(no % 2 == 1)`.