Regular Expressions 101

Explanation
Pro

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

Character Class[-+]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

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

Group 2(\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Group 3((\.)(\d+)(e)([-+])(\d+))?

?repeats the group contents below at most once:

Group 4(\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 5(\d+)

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

Group 6(e)

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

Group 7([-+])

Character Class[-+]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

Group 8(\d+)

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

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

([-+]?\d+)(\.\d+)?((\.)(\d+)(e)([-+])(\d+))?

New

-1.06581.4e-14
1.06581.4e-14
1.06581.4e+14
+1.06581.4e-14
+1.06581
1.06
1

\1\2\5\8

-1.06581.4e-14
1.06581.4e-14
1.06581.4e+14
+1.06581.4e-14
+1.06581
1.06
1