Regular Expressions 101

Explanation

Pro

^start of line

Group 1(1[1-9]|20|6[5-9]|[7-9][0-9]|100)

1st Alternative1[1-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[1-9]

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

2nd Alternative20

20the literal text 20

3rd Alternative6[5-9]

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

Character Class[5-9]

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

4th Alternative[7-9][0-9]

Character Class[7-9]

7-9one character from 7 (55₁₀) to 9 (57₁₀)

Character Class[0-9]

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

5th Alternative100

100the literal text 100

$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

^(1[1-9]|20|6[5-9]|[7-9][0-9]|100)$

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