Regular expression to match a percentage with decimal?

Question

I\'m attempting to build a regular expression (.NET) to match a percentage with 4 decimal places. The 4 decimal places are required. The range looks like:

0.         


        

Answer 1

See it in action:

^(0|[1-9]\d?)\.\d{4}|100\.0000$

Matches:

0.0001
100.0000
42.4214
1.0000

Doesn't match:

100.0135
042.4214
001.0000
000.0000
1000.0000
2000.0000
300.0000