With JavaScript, you can pass different parameters while calling a function. These passed parameters can be captured inside the function and any manipulation can be done over those parameters. A function can take multiple parameters separated by a comma.
Example
You can try to run the following code to learn how to add parameters to JavaScript functions −
<html>
<head>
<script>
function sayHello(name, age) {
document.write (name + " is " + age + " years old.");
}
</script>
</head>
<body>
<p>Click the following button to call the function</p>
<form>
<input type = "button" onclick = "sayHello('John', 27)" value = "Details">
</form>
</body>
</html>