Split a string and do addition, multiplication etc

Question

I have a string like 10+20*30-40/2. Is it possible to split this string and do calculations like + for addition, or * for multiplication?

I would like to split the sting and do addition multiplication etc.May i know how to proceed for this? — localhost, Feb 04 '13 at 10:44
This is a duplicate of: http://stackoverflow.com/questions/2276021/evaluating-a-string-as-a-mathematical-expression-in-javascript — ARF, Feb 04 '13 at 10:44

score 5 · Accepted Answer · answered Feb 04 '13 at 10:43

5

You could do this very easily with the eval function...

var answer = eval("10+20*30-40/2");
alert(answer);

But you should be careful, because if you are accepting user input for this string then it could be malicious.

answered Feb 04 '13 at 10:43

musefan

Thank you for your response.I would like to split the sting and do this.Like + for addition * for multiplication etc – localhost Feb 04 '13 at 10:46
@dddddd: I think if you want manual parsing, then you question is to broad as it currently stands. You need to try some stuff and come back with more specific questions/problems. [Here is an interesting article](http://journal.stuffwithstuff.com/2011/03/19/pratt-parsers-expression-parsing-made-easy/) that might help, it's not in javascript and I haven't read it, but it looks like it could be useful in explaining the process – musefan Feb 04 '13 at 10:53

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