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"let me know if" vs "let me know whether"

Both 'let me know if' and 'let me know whether' are correct and commonly used in English. They are interchangeable and can be used to ask for information or clarification. The choice between 'if' and 'whether' is a matter of personal preference.

Last Updated: March 23, 2024

let me know if

This phrase is correct and commonly used in English.

This phrase is used to ask someone to inform you about something or to confirm a condition. It is often used in informal conversations.

Examples:

  • Let me know if you need any help.
  • Please let me know if you can make it to the party.
  • Let me know if you have any questions.

Alternatives:

  • Please inform me if
  • Tell me if
  • Keep me posted if

let me know whether

This phrase is correct and commonly used in English.

This phrase is also used to ask for information or clarification. It is slightly more formal than 'let me know if' but can be used interchangeably.

Examples:

  • Let me know whether you can attend the meeting.
  • Please let me know whether you received the package.
  • Let me know whether you need any assistance.

Alternatives:

  • Please inform me whether
  • Tell me whether
  • Keep me posted whether

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