Data validation rule - cannot begin with specific character

debsa_hungary

New Member
Joined
Sep 7, 2023
Messages
2
Office Version
  1. 365
Platform
  1. Windows
  2. Mobile
  3. Web
Hi
I need a data validation rule that forbids the value entered in the cell to start with =+

thanks for your help in advance
 

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I'm done :D
this formula works well
=NOT(ISNUMBER(SEARCH("=+",FORMULATEXT(G10))))
 
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