Bit Upgrade Forge - Turn On the ith Bit

🔧 The Forge

n | (1 << i) → Turn ON bit i

Original Number (n) 0

Mask (1 << i) 0

Result (n | mask) 0

Number (n)

Bit Position (i)

📚 Turn ON the ith Bit

To turn ON (set to 1) the ith bit of a number, use OR with a mask:

          result = n | (1 << i)

          // Example: Turn on bit 4 of 42

          // 42 = 00101010

          // 1 << 4 = 00010000

          // OR -----------

          // 58 = 00111010

The mask (1 << i) has only bit i set to 1. ORing with this mask ensures bit i becomes 1, leaving other bits unchanged.