How to change a string expression to an resulted integer?

Question

Possible Duplicate:
How can I execute Javascript stored as a string?

Let us suppose this:

var a = 10;
var b = 20;
var exp = "a+b";
var result = ?;

Change the above expression which is string to give result in integer. Variable a is 10. Variable b is 20. Variable exp is a string containing the expression. Change that string expression to add variable a and variable b and store it in Variable result.

How can I do that with Javascript?

score 1 · Accepted Answer · answered Jan 21 '13 at 14:34

1

By using Javascript eval() function you can do above thing.

Like:

var a = 10;
var b = 20;
var exp = "a+b";
var result = eval(exp);

answered Jan 21 '13 at 14:34

Muhammad Talha Akbar

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`eval` works, but avoid it unless absolutely necessary: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/eval#Don.27t_use_eval.21 – rink.attendant.6 Jan 21 '13 at 14:40
yeah, I know buddy that it is to be avoided :D but thanks :) – Muhammad Talha Akbar Jan 21 '13 at 14:42

How to change a string expression to an resulted integer?

1 Answers1