JS Functions with Parameters

The Javascript Function Parameters are the names that are defined in the function definition and real values passed to the function in the function definition are known as arguments.

Syntax:

function Name(paramet1, paramet2, paramet3,...) 
{
     // Statements
}

Parameter Rules:

There is no need to specify the data type for parameters in JavaScript function definitions.
It does not perform type-checking based on the passed-in JavaScript functions.
It does not check the number of received arguments.

Parameters:

Name: It is used to specify the name of the function.
Arguments: It is provided in the argument field of the function.

Default Parameter:

The default parameters are used to initialize the named parameters with default values in case, when no value or undefined is passed.

Syntax:

function Name(paramet1 = value1, paramet2 = value2 .. .) 
{
    // statements
}

<!DOCTYPE html>
<html>
<head>
    <title>JavaScript</title>
    <script>
        /* Functions With Parameters*/
        function hello(fname= "Yahoo",lname= "Baba") {
            document.write("Hello" + fname + " " + lname + "<br>");
        }
            
        hello("Ram","Singh");
        hello("Salman", "Khan");
    </script>
</head>
<body>
</body>
</html>