Regular Expressions 101

Pro

Character Class[1-9]+

+matches at least one character from the set below:

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

\.+the literal . (46₁₀ / 56₈ / 2E₁₆) , repeated at least once

Character Class[0-9]+

+matches at least one character from the set below:

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

Group 1(e\+|E\+)

1st Alternativee\+

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

2nd AlternativeE\+

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Character Class[2-9]+

+matches at least one character from the set below:

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

Character Class[0-9]+

+matches at least one character from the set below:

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

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.

27 tokens

Regular Expression

[1-9]+\.+[0-9]+(e\+|E\+)[2-9]+[0-9]+

1.2917967061810938e+20
1.2917967061810938e-20

1.2917967061810938E+20
1.2917967061810938E-20

1.2917967061810938e+20
6.162625864261435e+18
1.232525172852287e+19

10000

.00001
1211.

0.12791
1.20932
10032.02

1.000e-20
1.00e+20