1. Write a program that prints "Hello, World!" to the console.
2. Write a program that takes two integers as input and prints their sum.
3. Write a program to calculate the area of a circle given its radius.
4. Write a program that checks whether a given number is even or odd.
5. Write a program that performs addition, subtraction, multiplication, and division.
6. Write a program to calculate the factorial of a number.
7. Write a program that checks if a number is prime.
8. Write a program to print the Fibonacci series up to a specified number.
9. Write a program that reverses a given string.
10. Write a program to count the number of vowels in a string.
11. Write a program that finds the maximum of three numbers.
12. Write a program to check if a string is a palindrome.
13. Write a program to swap two variables without using a third variable.
14. Write a program that calculates the sum of digits of a number.
15. Write a program to print a multiplication table for a given number.
16. Write a program to find the largest element in an array.
17. Write a program to find the smallest element in an array.
18. Write a program to sort an array of integers.
19. Write a program to merge two arrays.
20. Write a program to remove duplicates from an array.
21. Write a program that counts the number of occurrences of each character in a string.
22. Write a program to find the second largest number in an array.
23. Write a program that generates a random number between 1 and 100.
24. Write a program to check if two strings are anagrams.
25. Write a program that prints the first N prime numbers.
26. Write a program that checks if a number is a perfect square.
27. Write a program to convert temperature from Celsius to Fahrenheit.
28. Write a program to calculate the sum of the first N natural numbers.
29. Write a program that finds the GCD of two numbers.
30. Write a program that finds the LCM of two numbers.
31. Write a program to generate the first N Fibonacci numbers.
32. Write a program to calculate the power of a number using recursion.
33. Write a program to find the length of a string without using the length method.
34. Write a program to check if a number is an Armstrong number.
35. Write a program to find the number of digits in a number.
36. Write a program to find the sum of even and odd numbers in an array.
37. Write a program to calculate the simple interest.
38. Write a program to check if a year is a leap year.
39. Write a program that prints a diamond pattern using stars.
40. Write a program to check if a given number is a Fibonacci number.