Function
Function is a reusable block of code designed to perform a specific task
CODE
Eg:
function greet() {
console.log("Hello, World!");
}
greet(); // Output: Hello, World!
Function with Parameters
Sometimes we want to pass values to a function. These values are called parameters.
CODE
Eg:
function greet(name) {
console.log("Hello " + name);
}
greet("Pranay"); // Output: Hello Pranay
Function with Multiple Parameters
A function can have more than one parameter.
CODE
Eg:
function add(a, b) {
console.log(a + b);
}
add(10, 20); // Output: 30
Function with Return Value
Sometimes we don't want to print the result directly. Instead, we want the function to send the result back.For that, we use the return keyword.
CODE
Eg:
function add(a, b) {
return a + b;
}
let result = add(10, 20);
console.log(result); // Output: 30
// The return statement ends the function and returns the value.
Function Expression
A function can also be stored inside a variable.
CODE
Eg:
const greet = function() {
console.log("Hello JavaScript");
};
greet(); // Output: Hello JavaScript
Arrow Function
Arrow functions are a shorter way to write functions.
CODE
**Arrow Function**
Eg:
const greet = () => {
console.log("Hello JavaScript");
};
greet(); //Output: Hello JavaScript
**Arrow Function with Parameters**
Eg:
const add = (a, b) => {
return a + b;
};
console.log(add(10, 20)); // Output: 30
// If the function has only one line, we can write it even shorter.
Eg:
const add = (a, b) => a + b;
console.log(add(10, 20)); // Output: 30
Anonymous Function
A function without a name is called an Anonymous Function.
CODE
Eg:
const message = function() {
console.log("Welcome");
};
message(); // Output: Welcome
// Here, the function has no name and is stored inside the variable message.
Vollständiger Original-Bericht
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