How can I optimize my code using bitwise operators?

How can I optimize my code using bitwise operators?

Bitwise operators can significantly speed up certain operations. For example, instead of using multiplication by 2, you can use a left shift (x << 1). What specific operations are you looking to optimize?

I'm working on a function that checks if a number is even or odd.

You can use the bitwise AND operator. Instead of using if (num % 2 == 0), you can use if ((num & 1) == 0). This is generally faster.

Are there other examples where bitwise operators can help?

Yes, bitwise operators are great for tasks like swapping values without a temporary variable or manipulating flags in a bitmask.

Can you show me how to swap two numbers using bitwise operators?

Certainly! You can swap two numbers a and b using XOR: a = a ^ b; b = a ^ b; a = a ^ b;. This avoids using a temporary variable.