Can someone help please?

javascript

#1

I've written a code and the result surprises me.

for(var i = 0; i < 6; i++) {
console.log(i & 2)
}

For this code, it says: 0 0 2 2 0 0

I don't understand why doesn't it say: 0 1 0 1 0 1

Can someone explain to me please? (Also please tell me how can I get the modulo of the i-s, which would be 0 1 0 1 0 1.)

Thank you!


#2

The code you want:

for( var i=0; i<6; i++) { 
console.log(i%2)
 }

The "&" operator is a "bitwise" operator. It was executing a logical AND.

if you are familiar with binary digits, this tells you what you where doing:
000 AND 010 = 000 (binary) = 0 (decimal)
001 AND 010 = 000 (binary) = 0 (decimal)
010 AND 010 = 010 (binary) = 2 (decimal)
011 AND 010 = 010 (binary) = 2 (decimal)
100 AND 010 = 000 (binary) = 0 (decimal)
101 AND 010 = 000 (binary) = 0 (decimal)

More on javascript operators Here: http://www.w3schools.com/js/js_comparisons.asp


#4

Thanks, now it works! :slight_smile: