Regular Expressions 101

Explanation
Pro

^start of line

Character Class[-+]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

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

Group 1(\.[0-9]+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

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

Character Class[[:space:]]?

?matches at most one character from the set below:

[:space:]a whitespace character, including a line break [ \t\r\n\v\f]

Character Class[CFcf]?

?matches at most one character from the set below:

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

Fthe literal F (70₁₀ / 106₈ / 46₁₆) (case sensitive)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

$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

^[-+]?[0-9]+(\.[0-9]+)?[[:space:]]?[CFcf]?$

13
102
97.0
-4.28
11.25
+8
0.015
19 c
19F
32C
-17.20 c