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JavaScript

Posted by Trent Baldwin
Trent Baldwin
3,542 Points

Why does this not do anything?

I used the following code and when I clicked the button it did not run. Why is this?

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-08">
        <link rel="stylesheet" type="text/css" href="main.css">
    </head>
    <body>
        <button type="button" onClick="myFunction()">Run</button>
        <script type="text/javascript">
            function myFunction() {
                var a=2;
                var b=2;
                var c=4;
                if a+b=c {
                    document.write("True");
                } else {
                    document.write("False");
                }
            }
        </script>
    </body>
</html>

1 Answer

Christian Andersson
Christian Andersson
8,712 Points

your if-statement has some syntax errors. The condition that you are checking needs to be inside of a parenthesis. Like this:

if (a+b==c) {
...
}

Also, as you can see from this code, I have added another = sign in that condition. A single = sign serves the purpose of assigning a value , usually to a variable just like you did at the start of your code. Double == however means "equals" and that's what you need to use when checking if a condition is met or not.