Regular Expressions 101

^start of line

Non-Capturing Group(?:(?:[0-9]|[1-9][0-9]{1,11})(?:\.\d{1,2})?|10{11}(?:\.00?)?)

1st Alternative(?:[0-9]|[1-9][0-9]{1,11})(?:\.\d{1,2})?

Non-Capturing Group(?:[0-9]|[1-9][0-9]{1,11})

1st Alternative[0-9]

Character Class[0-9]

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

2nd Alternative[1-9][0-9]{1,11}

Character Class[1-9]

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

Character Class[0-9]{1,11}

{1,11}matches between 1 and 11 characters from the set below:

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

Non-Capturing Group(?:\.\d{1,2})?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

2nd Alternative10{11}(?:\.00?)?

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

0{11}the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated exactly 11 times

Non-Capturing Group(?:\.00?)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

0?optionally matches the 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.

Search reference

Regular Expression

^(?:(?:[0-9]|[1-9][0-9]{1,11})(?:\.\d{1,2})?|10{11}(?:\.00?)?)$

New

1
10
100
1000
10000
100000
1000000
10000000
100000000
1000000000
10000000000
99999999999
99999999999.98
99999999999.989
100000000000
100000000000.0
100000000000.00
100000000000.000
1000000000000

Regular Expression

Extraction