Regular Expressions 101

Pro

^start of line

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Non-Capturing Group(?:[0-25-9][0-9]|[34][1-9])

1st Alternative[0-25-9][0-9]

Character Class[0-25-9]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

5-9one character from 5 (53₁₀) to 9 (57₁₀)

Character Class[0-9]

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

2nd Alternative[34][1-9]

Character Class[34]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

Character Class[1-9]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

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

$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

^3(?:[0-25-9][0-9]|[34][1-9])\.[0-9]{3}$

New

345.678
340.889
330.750
356.111
123.456
1324.45764576
341.678