Function-1

JavaScript multiplication function is used to multiply 2 variable in the below example. 
function multiplication(a, b) { return a * b; }
How to call JavaScript function?
multiplication(4, 3) will result to 12.

<!DOCTYPE html>
<html>
<head>
<title>Welcome to LearnKode - A code learning platform</title>
</head>  
 <body>
<p id="sample"></p>

<script>
function multiplication(a, b) {
    return a * b;
}
document.getElementById("sample").innerHTML = multiplication(4, 3);
</script>
</body>
</html>

Output