Excel format cells for numbers only

  • Thread starter Thread starter Tony O
  • Start date Start date
T

Tony O

I am using a series of four digit numbers for data entry in Microsoft
Excel. How do I set it up so it only
accepts numbers, but rejects letters?

for example, these would be allowed:
1234
4321

These would be rejected:
a234
aaaa
a2b4
 
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