Question

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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?

Answer 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);