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{1,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,2}a digit, repeated between 1 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{1,2})?

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

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