Simple regular expression for a decimal with a precision of 2

Question

What is the regular expression for a decimal with a precision of 2?

Valid examples:

123.12
2
56754
92929292929292.12
0.21
3.1

Answer 1

Won't you need to take the e in e666.76 into account?

With

(e|0-9)\d*\d.\d{1,2)