html - Can we validate .0 using regex -

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i'm doing field accept whole numbers. did regex validation /^\d{1,3}$/ validating whole number entry , not allow decimal .1 e.g make 1.1 invalid when tried input 1.0 accepted it. there regex check .0?

^\d{1,3}(\.0)?$ accepts one, 2 or 3 digit whole numbers if end .0.


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