How to parse arithmetic operators from string?

Question

Is it possible to assign an int variable a value that is a result of expression written in a string? E.g. I have a string "5 - 3" and the expected result is 2.

possible duplicate of [in c#: expression evaluation function like flash script](http://stackoverflow.com/questions/534894/in-c-expression-evaluation-function-like-flash-script) — Henk Holterman, Sep 28 '10 at 10:12
Possible duplicate of [Converting string expression to Integer Value](http://stackoverflow.com/questions/2607798/). — Dour High Arch, May 09 '17 at 01:21

score 4 · Answer 1 · answered Sep 28 '10 at 10:10

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You can use Calculator.NET

answered Sep 28 '10 at 10:10

Giorgi

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Thanks! I believe that is what I need. – tyumener Sep 28 '10 at 10:34

score 1 · Answer 2 · edited Sep 28 '10 at 10:25

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If you fancy writing your own (I did, it's fun!). Have a look on Wikipedia for:

Shunting Yard Algorithm and Reverse Polish Notation

The pseudo-code is really clear and it's a great learning experience

edited Sep 28 '10 at 10:25

veggerby

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answered Sep 28 '10 at 10:19

RichK

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score -1 · Answer 3 · answered Sep 28 '10 at 10:11

There is nothing built into the framework, so you can either built your own mathematical expression parser, or use one of the many libraries out there.

A search on ".net arithmetic parser" comes up with many results, some free, some not.

For instance:

How to parse arithmetic operators from string?

3 Answers3

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