Jelaskan apa yang dimaksud dengan function atau method pada javascript?

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JavaScript Functions: A function is a block of code written to perform some specific set of tasks. We can define a function using the function keyword, followed by Name and optional parameters. Body of function is enclosed in Curly braces.

Syntax: 

function functionName[parameters] {
    // Content
}

Features:

• The function is executed when something calls/invokes it.
• The name may contain letters, digits, dollar signs, underscore.
• Parameters are listed inside round parenthesis after the name of the function.
• Arguments are values a function receives when it is invoked.
• When the control reaches the return statement, js will stop executing and the value is returned to the caller.

Example: Below is the function to add two numbers.

Javascript

function func[a, b] {

var sum = a + b;

return sum;

}

console.log[func[1, 2]];

Output:

3

JavaScript Methods: A JavaScript method is a property of an object that contains a function definition. Methods are functions stored as object properties. Object method can be accessed with the following syntax:

Syntax:

object = {
    methodName: function[] {
        // Content
    }
};

object.methodName[]

Features:

• Actions that can be performed on objects are what we term JavaScript methods.
• The objects can also be called without using parenthesis.
• This refers to the owner object in a method.

Example: The following example shows the method that is invoked with an object called employee.

Javascript

            var employee = {

                empname: "Rahul",

                department : "sales",

                details : function[] {

                    return this.empname +

                        " works with Department " +

                        this.department;

                }

            };

            console.log[employee.details[]];

Output:

Rahul works with Department sales

Difference Between Function and Method:

Function

Method