Regular Expressions 101

Pro

^start of line

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\d{0,3}a digit, repeated between 0 and 3 times

Non-Capturing Group(?:\.\d{0,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{0,2}a digit, repeated between 0 and 2 times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

26 tokens

^[1-9]\d{0,3}(?:\.\d{0,2})?

New

1234567890.56566456465aa
1.000
456456
545 454
56465. 54645
655.468
65464.....465465
5.7
66.4
00.00
8.0
8.00
8.a
0.0
1.000
00001.1
546.54
4.9
9.999