JS & DOM Reference
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JavaScript eval() Function
JavaScript Global Functions
Definition and Usage
The eval() function evaluates or executes an argument.
If the argument is an expression, eval() evaluates the expression. If the argument is one or more JavaScript statements, eval() executes the statements.
Syntax
eval(string)
| Parameter | Description |
|---|---|
| string | A JavaScript expression, variable, statement, or sequence of statements |
Browser Support
The eval() function is supported in all major browsers.
Example
Example
Evaluate/Execute JavaScript code/expressions:
<script type="text/javascript">
eval("x=10;y=20;document.write(x*y)");
document.write("<br />" + eval("2+2"));
document.write("<br />" + eval(x+17));
</script>
eval("x=10;y=20;document.write(x*y)");
document.write("<br />" + eval("2+2"));
document.write("<br />" + eval(x+17));
</script>
The output of the code above will be:
200
4
27
4
27
Try it yourself »
JavaScript Global Functions
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Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.