Regular Expressions 101

1st Alternative-?0+\.(0)+\b

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 1(0)+

+repeats the group contents below at least once:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\ban ASCII word boundary

2nd Alternative\.0+\b

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

\ban ASCII word boundary

3rd Alternative\b0+(?=\.\d*[1-9])

\ban ASCII word boundary

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

Positive Lookahead(?=\.\d*[1-9])

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d*a digit, repeated any number of times

Character Class[1-9]

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

4th Alternative\b0+(?=[1-9]\d*\.)

\ban ASCII word boundary

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

Positive Lookahead(?=[1-9]\d*\.)

Character Class[1-9]

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

\d*a digit, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

5th Alternative(\.\d*?)0+\b

Group 2(\.\d*?)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

\ban ASCII word boundary

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

-?0+\.(0)+\b|\.0+\b|\b0+(?=\.\d*[1-9])|\b0+(?=[1-9]\d*\.)|(\.\d*?)0+\b

0.00,-0.00,00.00,-00.00,40.00,-40.00,4.0,-4.0,4.01,-4.01,04.01,-04.01,004.04,-004.04,0004.040,-0004.040,101,.40,-.40,0.40,-0.40