Regular Expressions 101

^start of line

Non-Capturing Group(?:102[4-9]|10[3-9]\d|1[1-9]\d{2}|[2-9]\d{3}|[1-5]\d{4}|6[0-4]\d{3}|65[0-4]\d{2}|655[0-2]\d|6553[0-5])

1st Alternative102[4-9]

102the literal text 102

Character Class[4-9]

4-9one character from 4 (52₁₀) to 9 (57₁₀)

2nd Alternative10[3-9]\d

10the literal text 10

Character Class[3-9]

3-9one character from 3 (51₁₀) to 9 (57₁₀)

\da digit

3rd Alternative1[1-9]\d{2}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[1-9]

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

\d{2}a digit, repeated exactly 2 times

4th Alternative[2-9]\d{3}

Character Class[2-9]

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

\d{3}a digit, repeated exactly 3 times

5th Alternative[1-5]\d{4}

Character Class[1-5]

1-5one character from 1 (49₁₀) to 5 (53₁₀)

\d{4}a digit, repeated exactly 4 times

6th Alternative6[0-4]\d{3}

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\d{3}a digit, repeated exactly 3 times

7th Alternative65[0-4]\d{2}

65the literal text 65

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\d{2}a digit, repeated exactly 2 times

8th Alternative655[0-2]\d

655the literal text 655

Character Class[0-2]

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

\da digit

9th Alternative6553[0-5]

6553the literal text 6553

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

$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

Search reference

Regular Expression

^(?:102[4-9]|10[3-9]\d|1[1-9]\d{2}|[2-9]\d{3}|[1-5]\d{4}|6[0-4]\d{3}|65[0-4]\d{2}|655[0-2]\d|6553[0-5])$

Unit Tests

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