Regular Expressions 101

Explanation

Pro

1st Alternative(?<!-)(0,\d*[0-9])

Negative Lookbehind(?<!-)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 1(0,\d*[0-9])

0,the literal text 0,

\d*a digit, repeated any number of times

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative(?<!0)([1-9]\d*,\d*)

Negative Lookbehind(?<!0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Group 2([1-9]\d*,\d*)

Character Class[1-9]

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

\d*a digit, repeated any number of times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d*a digit, repeated any number of times

3rd Alternative(-[0-9],\d*?[1-9]\d*)

Group 3(-[0-9],\d*?[1-9]\d*)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d*?a digit, repeated any number of times

Character Class[1-9]

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

\d*a digit, repeated any number of times

4th Alternative(-[1-9]\d*,{0,1}\d*)

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[1-9]

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

\d*a digit, repeated any number of times

,{0,1}optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

\d*a digit, repeated any number of times

5th Alternative\b(?<!-)(0)[a-zA-Z,\n]

\ban ASCII word boundary

Negative Lookbehind(?<!-)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 5(0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[a-zA-Z,\n]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\na line-feed (newline) character (ASCII 10)

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?<!-)(0,\d*[0-9])|(?<!0)([1-9]\d*,\d*)|(-[0-9],\d*?[1-9]\d*)|(-[1-9]\d*,{0,1}\d*)|\b(?<!-)(0)[a-zA-Z,\n]

New

Deverá aceitar:

0
0,
0,0
0,00
0,010
0,00000000000000000000002
0,01
0,99
0,1
1234567890,99
-1234567890,99
-0,01
-0,99
1,00
-1,00
-1,012


Não poderá aceitar:

-0
-0,
-0,00
-,01 a -,99
//Sequencia vazio
01,00
01
0012

Substitution

Deverá aceitar:

0
0,
0,0
0,00
0,010
0,00000000000000000000002
0,01
0,99
0,1
1234567890,99
-1234567890,99
-0,01
-0,99
1,00
-1,00
-1,012


Não poderá aceitar:

-0
-0,
-0,00
-,01 a -,99
//Sequencia vazio
01,00
01
0012