Regular Expressions 101

^start of line

Character Class[a-zA-Z]{2}

{2}matches exactly 2 characters from the set below:

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

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

Non-Capturing Group(?:0[2-9]|[1-8][0-9]|9[0-8])

1st Alternative0[2-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[2-9]

2-9one character from 2 (50₁₀) to 9 (57₁₀)

2nd Alternative[1-8][0-9]

Character Class[1-8]

1-8one character from 1 (49₁₀) to 8 (56₁₀)

Character Class[0-9]

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

3rd Alternative9[0-8]

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[0-8]

0-8one character from 0 (48₁₀) to 8 (56₁₀)

Character Class[a-zA-Z0-9]{4}

{4}matches exactly 4 characters from the set below:

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

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

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

Character Class[0-9]{6}

{6}matches exactly 6 characters from the set below:

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

Character Class[a-zA-Z0-9]{0,20}

{0,20}matches between 0 and 20 characters from the set below:

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

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

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

No unit tests · Add a test to get started

25 tokens

Regular Expression

^[a-zA-Z]{2}(?:0[2-9]|[1-8][0-9]|9[0-8])[a-zA-Z0-9]{4}[0-9]{6}[a-zA-Z0-9]{0,20}$

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