Regular Expression for Matching Numbers with Optional Decimal Points

This regular expression matches a string that contains one or two digits ('\d{1,2}') followed by an optional decimal point and one or two more digits ('(.\d{1,2})?').

Here are some examples of strings that would match this regular expression:

• '1'
• '12'
• '1.5'
• '22.75'

And here are some examples of strings that would not match:

• '0.123' (more than two digits after the decimal point)
• '3.' (decimal point without any digits after it)
• '1.23456' (more than two digits after the decimal point)