1. Using map

1. Given an array of numbers, return a new array where each number is squared.

   const numbers = [2, 3, 4, 5];
   
   

2. Convert an array of strings to uppercase.

   const words = ["hello", "world", "javascript"];
   
   

3. Given an array of objects with price and quantity, return an array with total prices (price * quantity).

   const items = [
       { price: 10, quantity: 2 },
       { price: 5, quantity: 5 },
       { price: 8, quantity: 3 }
   ];
   
   

2. Using filter

1. Given an array of numbers, return an array with only even numbers.

   const numbers = [1, 2, 3, 4, 5, 6, 7, 8];
   
   

2. Filter out strings with a length of less than 5 characters.

   const words = ["apple", "bat", "banana", "cat", "grape"];
   
   

3. Given an array of objects representing students, return only the students who passed (marks >= 40).

   const students = [
       { name: "John", marks: 35 },
       { name: "Alice", marks: 50 },
       { name: "Bob", marks: 40 },
       { name: "Emma", marks: 30 }
   ];
   
   

3. Using forEach

1. Given an array of numbers, print each number multiplied by 2.

   const numbers = [1, 2, 3, 4, 5];
   
   

2. Print each word in an array along with its length.

   const words = ["JavaScript", "React", "Node", "MongoDB"];
   
   

3. Given an array of products, print the product name and price in the format: "Product: Laptop, Price: 50000".

   const products = [
       { name: "Laptop", price: 50000 },
       { name: "Phone", price: 30000 },
       { name: "Tablet", price: 20000 }
   ];