if vs. whether

Last Updated : Feb 10, 2023 |

Use if for a conditional idea. Use whether for an alternative or possibility. Do not use whether or not.

Preferred

Discouraged

Look at the faceplate to determine if the LEDs are lit.

Look at the faceplate to determine whether the LEDs are lit.

You can decide whether to accept the call.

You can decide whether or not to accept the call.