Javascript function

1.Function Declaration

function functionName(parameters) {
    // Code to be executed
    return value; // Optional
}

Example:

function greet(name) {
    return `Hello, ${name}!`;
}
console.log(greet("Alice")); // Output: Hello, Alice!

2.Function Expression

const functionName = function(parameters) {
    // Code to be executed
    return value; // Optional
};

Example:

const add = function(a, b) {
    return a + b;
};
console.log(add(5, 3)); // Output: 8

3.Arrow Function (ES6)

const functionName = (parameters) => {
    // Code to be executed
    return value; // Optional
};

Example:

const multiply = (a, b) => a * b;
console.log(multiply(4, 2)); // Output: 8

Published by Zahid Hossain