Want to add a "Killer" trick.
A function to check if a given positive integer is a power of 2
function isPowerofTwo(num){ if( num & (num-1) == 0 ) return true; return false; }
& used here is the Bitwise AND.
&
This is what the modulus operator % is for. By negating the check, you return 1 (true) or 0 (false) with: console.log(!num % 2)
%
console.log(!num % 2)
Modulus checks if the number is divisible by a number or not, It doesn't checks for exponent.
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Want to add a "Killer" trick.
A function to check if a given positive integer is a power of 2
&used here is the Bitwise AND.This is what the modulus operator
%is for. By negating the check, you return 1 (true) or 0 (false) with:console.log(!num % 2)Modulus checks if the number is divisible by a number or not, It doesn't checks for exponent.