Check if two numbers are equal without any comparison

Logic 1: 

If two numbers are equal the bitwise XOR result will be zero. In this way we can check two numbers are equal without any comparison.

For example :

1) 5^5 = 0

(5)10 = (0101)2
0101
0101
-------
0000

2) 12^12 = 0
(12)10 = (1100)2
1100
1100
------
0000

C program :

int main()
{
    int num1 = 10, num2 = 10;
    if((num1 ^ num2) == 0)
        printf("Equal");
    else
        printf("Unequal");
    return 0;
}

Logic 2 : 

We know, subtraction of two equal numbers is Zero. Means number are zero if equal other wise non-zero.

C program :

int main()
{
    int num1 = 10, num2 = 10;
    if(!(num1 - num2))
        printf("Equal");
    else
        printf("Unequal");
    return 0;
}