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Scientific Floating Point Number with Optional Integer Part
(
(
\b
[0-9]
+
)
?
\.
)
?
\b
[0-9]
+
(
[eE]
[-+]
?
[0-9]
+
)
?
\b
Match the regular expression below and capture its match into backreference number 1
Between zero and one times, as many times as possible, giving back as needed (greedy)
Match the regular expression below and capture its match into backreference number 2
Between zero and one times, as many times as possible, giving back as needed (greedy)
Assert position at a word boundary
Match a single character out of the list: in the range between 0 and 9
Between one and unlimited times, as many times as possible, giving back as needed (greedy)
Match the character "." literally
Assert position at a word boundary
Match a single character out of the list: in the range between 0 and 9
Between one and unlimited times, as many times as possible, giving back as needed (greedy)
Match the regular expression below and capture its match into backreference number 3
Between zero and one times, as many times as possible, giving back as needed (greedy)
Match a single character out of the list: one of the characters "eE"
Match a single character out of the list: one of the characters "-+"
Between zero and one times, as many times as possible, giving back as needed (greedy)
Match a single character out of the list: in the range between 0 and 9
Between one and unlimited times, as many times as possible, giving back as needed (greedy)
Assert position at a word boundary
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