Hackforge Academy

Explanation

Functions are reusable blocks of code that perform a specific task and can accept input through parameters.

Code:

function greet(name) {
  console.log('Hello ' + name);
}
greet('John');

Explanation

Functions can return values using the return statement.

Code:

function add(a, b) {
  return a + b;
}
console.log(add(5, 3));

Explanation

Variables declared inside a function have local scope and are accessible only within that function.

Code:

function demo() {
  let message = 'Hello';
  console.log(message);
}

Explanation

Variables declared outside functions have global scope and can be accessed throughout the program.

Code:

let company = 'HackForge';
function show() {
  console.log(company);
}

Explanation

Block scope, introduced with let and const, limits variable access to the block in which they are declared.

Code:

if (true) {
  let age = 25;
  console.log(age);
}