CODEWITHSUNDEEP
regex
Ben313
Ben313

Reputation: 1668

Is there a regex to match a float with at most 7 digits?

I am looking for a regex to match a float with at most 7 digits. I cant figure out how to handle the decimal point in this. Is it even possible to match this with a regex? There has to be atleast 1 digit to the left of the decimal, and 0-6 digits to the right, but the total number of digits has to be 7 or less.

examples:

Good:

Bad:

Upvotes: 2

Views: 122

Answers (1)

Andrew Clark
Andrew Clark

Reputation: 208475

The following should work:

^(?!.*\..*\.|\d{8})\d[\d.]{,7}$

Example: http://www.rubular.com/r/gglVngm0pH

Explanation:

^            # beginning of string anchor
(?!          # start negative lookahead (fail if following regex can match)
   .*\..*\.    # two or more '.' characters exist in the string
   |           # OR
   \d{8}       # eight consecutive digits in the string
)            # end negative lookahead
\d           # match a digit
[\d.]{,7}    # match between 0 and 7 characters that are either '.' or a digit
$            # end of string anchor

Upvotes: 7

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