Demonstration of some practical uses of bit wise operators.

BitwiseFunctions.pwn

//Swapping two variables without the use of 3rd one using XOR
swap(&a,&b) 
{ 
    a ^= b; 
    b ^= a; 
    a ^= b; 
} 

//Checking two numbers have same signs using XOR
bool:IsSameSign(a,b) 
{ 
    return (!((a ^ b) < 0)); 
}  

//Checking is odd using AND
bool:IsOdd(a) 
{ 
    return ((a & 1) > 0); 
}  

//Checking is even using AND
bool:IsEven(a) 
{ 
    return ((a & 1) == 0); 
}

//To Lower using OR and Left Shift
ToLower(a) 
{ 
    return (a |(1<<5)); 
}

//To Upper using Not and AND (NAND) and Left Shift
ToUpper(a) 
{ 

    return (a &~(1<<5)); 
}