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. The body of a function is enclosed in Curly braces.
Syntax:
function helloName(parameters) {
// Just Write Hello World In The Console
console.log("Hello World!");
}
Features:
- The function is executed when something calls/invokes it.
- Arguments are values a function receives when it is invoked.
- Parameters are listed inside round parenthesis after the name of the function.
- The name of the function may contain letters, digits, dollar signs, underscore.
- When the control reaches the return statement, JavaScript will stop executing and the value is returned to the caller.
Example: Below is the function to print your name in the console.
function helloWorld(parameters) {
const name = "Amran";
console.log(`Hello ${name}!`);
}
Output:
Hello Amran!
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() {
// Some Code...
}
};
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.
const employee = {
name: "Amran",
department: "sales",
details: function() {
return this.name + " works with Department " + this.department;
}
};
console.log(employee.details());
Output:
Amran works with Department sales
Difference Between Function and Method:
Function:
- A function can be called directly by its name.
- A function can pass the data that is operated and may return the data.
- Data passed to a function is explicit.
- A function lives on its own.
Method:
- A method consists of a code that can be called by the name of its object and its method name using dot notation or square bracket notation..
- The method operates the data contained in a Class.
- A method implicitly passes the object on which it was called.
- A method is a function associated with an object property
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28 Comments on JavaScript Difference between Methods and Functions
Nice and simple... 7 views... I came all the way from dev Community
Thanks bro!🌹
Nice and short
Useful and short article.
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