Write reusable functions, understand function scope, closure, and the difference between function and block scope. Functions are the building blocks of modular code.

• Reusable functions
• Understand function scope
• Closure
• Block scope

function add(a, b) {
  return a + b;
}

console.log(add(3, 5));

const multiply = (x, y) => x * y;
console.log(multiply(4, 5));

• add function works correctly
• multiply arrow function works

• Function scope: variables declared inside a function are local to that function
• Closures: inner functions can access outer function variables
• Arrow functions: (args) => expression or (args) => { statements }

Write reusable functions, understand function scope, closure, and the difference between function and block scope. Functions are the building blocks of modular code.

• Reusable functions
• Understand function scope
• Closure
• Block scope

function add(a, b) {
  return a + b;
}

console.log(add(3, 5));

const multiply = (x, y) => x * y;
console.log(multiply(4, 5));

• add function works correctly
• multiply arrow function works

• Function scope: variables declared inside a function are local to that function
• Closures: inner functions can access outer function variables
• Arrow functions: (args) => expression or (args) => { statements }