EASY LEVEL (1–10)

1. Squares of Numbers

   Problem: Given a list of integers, return a new list containing squares of each number using list comprehension.

Input:
nums= [1,2,3,4]

Output:
[1,4,9,16]

1. Even Numbers

   Problem: Return a list containing only even numbers from given list.

Input:
nums= [1,2,3,4,5,6]

Output:
[2,4,6]

1. Odd Numbers

   Problem: Return a list containing only odd numbers.

Input:
nums= [1,2,3,4,5]

Output:
[1,3,5]

1. Convert to Uppercase

   Problem: Convert all strings in list to uppercase.

Input:
words= ["python","java"]

Output:
["PYTHON","JAVA"]

1. Length of Each Word

   Problem: Return list containing length of each word.

Input:
words= ["hi","world"]

Output:
[2,5]

1. Multiply by 2

   Problem: Multiply each number by 2.

Input:
nums= [1,2,3]

Output:
[2,4,6]

1. Filter Greater Than 10

   Problem: Return numbers greater than 10.