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JavaScript eval() Function

Definition and Usage

The eval() function evaluates a string and executes it as if it was script code.

eval(string)

Parameter	Description
string	Required. The string to be evaluated

In this example we use eval() on some strings and see what it returns:

<script type="text/javascript">

eval("x=10;y=20;document.write(x*y)");
document.write("<br />");

document.write(eval("2+2"));
document.write("<br />");

var x=10;
document.write(eval(x+17));
document.write("<br />");

</script>

The output of the code above will be:

200
4
27

JavaScript eval() Function Reviewed by 1000sourcecodes on 03:36 Rating: 5