How to compose a regular expression to remove the last zero in a number if the number is with a dot?

Question

Regular Expressions

Hello!
We have the following numbers:
900
900.00
900.90
Should be:
900
900
900.9
I can't make a regular expression.
All that could give birth: \.00+ or ​​\.\d{1,}

Answer 1

\.0+|(?<=\d\.[1-9])0+
only she will not haw like this:

900.990