Regex for integers and decimal

Question

Looking for a regex for the following

Should match value before decimal place.(should return 5 if value is 5.4)
Whole number should be matched as it it (2 in case of 2 and 4 in case of 4).

The numbers could be 1.2, 2.4, 2.5566, 3.555, 1, 2, 8

Regex should match 1, 2, 2, 3, 1, 2, 8

Possible duplicate of [RegEx for both, integer and float](http://stackoverflow.com/questions/14550526/regex-for-both-integer-and-float) — Thomas Ayoub, Aug 26 '16 at 10:00
\d*(\.\d{})? tested same of various tester websites but all giving different results. — Dineshh Bhardwaj, Aug 26 '16 at 10:33
Which language is it? Do you deal with strings or with numbers? — Thomas Ayoub, Aug 26 '16 at 14:30

score 2 · Accepted Answer · answered Aug 26 '16 at 17:01

2

You can use this regex:

(?:^|[^.0-9])([0-9]+)

This regex will not match digits that happen after a decimal point, or other numbers that happen after a decimal point.

In other words, it's the same number you would get if you extracted a float and then used Math.floor() (or equivalent).

You can find the result in the first capture group.

answered Aug 26 '16 at 17:01

Laurel

1

@DineshhBhardwaj Please don't add solved to your question title. You need to [accept my answer](http://stackoverflow.com/help/someone-answers) if it helped you. – Laurel Aug 27 '16 at 17:11

1 Answers1