Regular Expressions 101

Pro

Group 1(E[+-]\d+)

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

Character Class[+-]

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a Unicode decimal digit, repeated at least once

Group 2(\S)

\Sany character that is not Unicode whitespace

Group 3(\d|\.)

1st Alternative\d

\da Unicode decimal digit

2nd Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Regular Expression

(E[+-]\d+)(\S)(\d|\.)

New

2.744596610E-02 1.247197202E+00 7.121462841E-03 2.467938066E-05
2.732558411E-02 1.242196291E+00 1.365028508E-02 6.262368697E-05
2.713870635E-02 1.227254209E+00 1.958976965E-03-3.179617352E-06

Substitution

\1 -\3

2.744596610E-02 1.247197202E+00 7.121462841E-03 2.467938066E-05
2.732558411E-02 1.242196291E+00 1.365028508E-02 6.262368697E-05
2.713870635E-02 1.227254209E+00 1.958976965E-03-3.179617352E-06