"not equal to" operator not working in if-else statement

I have to check whether K-th bit of a number is set or not. Input: N = 4, K = 0 Output: false Explanation: Binary representation of 4 is 100, in which 0th bit from LSB is not set. So, return false.

This code does not work with the not equal to statement:

bool checkKthBit(int n, int k)
{
    if(n&(1<<k)!=0)
    return true;
    else
    return false;
}

However after removing the not equal to operator the code works perfectly fine:

bool checkKthBit(int n, int k)
{
    if(n&(1<<k))
    return true;
    else
    return false;
}

How is this happening?