“Let me know if you're coming or not.”
Usage Entry 1044 / 1350 60-second read
If vs. Whether
Conditions versus alternatives.
The comparisoni
“Let me know whether you're coming or not.”
The ruleii
¶
IF = condition. WHETHER = alternatives.
Use IF for a single condition (I'll come if it's sunny). Use WHETHER when presenting two alternatives, even implied (whether it's sunny or not).
Memory aidiii
Remember it like this
"Or not" present? Use WHETHER.