Conditionifelseif

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>conditional example: if, elseif </title>
</head>

<body>
<script>

    var mark =parseFloat(prompt("enter a mark"));

    if (mark >= 75)
        {// if the condition above is true this will be exectued if its false the code between the next braces will be executed
            alert( "Very good work!");
        }
    else if (mark >= 65)
        {
            alert("Good work,");

        }
     else if (mark >= 60)
        {
            alert("satasfactory work");

        }
     else if (mark >= 50)
        {
            alert("work harder.");

        }
    else
        {
            alert("Mark is below 50%. You are not passing. ");
        }


</script>
</body>

</html>