CODEWITHSUNDEEP
regex
Mefisto_Fell
Mefisto_Fell

Reputation: 916

Regular expression to test the mathematical expression

I dealing with regular expressions, this question arose. How to write a regular expression for math expression tests. I mean expression like this:

1+1
(1+1) * 2 / (4+1) + 3

and somthing like that.

I trying somthing like this:

"^(?:\\d+([*+-]|/(?!0)))+\\d+$"

But so does not pass option with brackets. How to make a regular expression that skipped both options that I described above? I need a regular expression to skip numbers, parentheses and fundamentals mathematical operations + - * / and spaces

Upvotes: 0

Views: 87

Answers (1)

Aaron
Aaron

Reputation: 24802

You could use the following :

^(?:\d+|\(\d+\s*[-+/*]\s*\d+\))(?:\s*[-+/*]\s*(?:\d+|\(\d+\s*[-+/*]\s*\d+\)))*$

Try it here

(?:\d+|\(\d+\s*[-+/*]\s*\d+\)) is a single number or a bracketed operation. This is matched at least once, then is followed by as many occurences separated by an operator as necessary.

Upvotes: 1

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