Regular Expressions 101

Group IsNumeric(?<IsNumeric>^[+-]?([1-9]*|[1-9]{1,3}(,\d{3})*|[0]*)(\.\d+)?)

^start of line

Character Class[+-]?

?matches at most one character from the set below:

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2([1-9]*|[1-9]{1,3}(,\d{3})*|[0]*)

1st Alternative[1-9]*

Character Class[1-9]*

*matches any number of characters from the set below:

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

2nd Alternative[1-9]{1,3}(,\d{3})*

Character Class[1-9]{1,3}

{1,3}matches between 1 and 3 characters from the set below:

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

Group 3(,\d{3})*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{3}a digit, repeated exactly 3 times

3rd Alternative[0]*

Character Class[0]*

*matches any number of characters from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Group 4(\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\ban ASCII word boundary

$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.

Search reference

Regular Expression

(?<IsNumeric>^[+-]?([1-9]*|[1-9]{1,3}(,\d{3})*|[0]*)(\.\d+)?)\b$

New

0.3
1
3
000691965
1,324,125.03
0,324,125.03
-1,324,125.03
abcd123
1.2.5
1234abc