Regular Expressions 101

^start of line

Group 1(([1-9]\d*(\,\d+)*(\.\d{1,4})?)|(0\.\d{1,4})|0)

1st Alternative([1-9]\d*(\,\d+)*(\.\d{1,4})?)

Group 2([1-9]\d*(\,\d+)*(\.\d{1,4})?)

Character Class[1-9]

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

\d*a digit, repeated any number of times

Group 3(\,\d+)*

*repeats the group contents below any number of times:

\,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a digit, repeated at least once

Group 4(\.\d{1,4})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,4}a digit, repeated between 1 and 4 times

2nd Alternative(0\.\d{1,4})

Group 5(0\.\d{1,4})

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,4}a digit, repeated between 1 and 4 times

3rd Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

$end of line

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.

25 tokens

Regular Expression

^(([1-9]\d*(\,\d+)*(\.\d{1,4})?)|(0\.\d{1,4})|0)$

New

2,000,000
200000.0000
200
200.00000
2,000.00
1000,000
1,000000
2,000,000
200000.0000
200
200.00000
2,000.00
2,0,00.00
1,234,456.7890
0900
0.88
0
890