1. Write a Python program to print "Hello, World!".

2. Write a Python program to add two numbers.

3. Write a Python program to find the square root of a number.

4. Write a Python program to calculate the area of a triangle.

5. Write a Python program to swap two variables.

6. Write a Python program to generate a random number.

7. Write a Python program to check if a number is positive, negative, or zero.

8. Write a Python program to check if a number is odd or even.

9. Write a Python program to find the factorial of a number.

10. Write a Python program to check if a year is a leap year.

11. Write a Python program to find the largest of three numbers.

12. Write a Python program to find the sum of natural numbers.

13. Write a Python program to find the ASCII value of a character.

14. Write a Python program to compute the power of a number.

15. Write a Python program to print all prime numbers in an interval.

16. Write a Python program to find the sum of digits in a number.

17. Write a Python program to reverse a string.

18. Write a Python program to check if a string is a palindrome.

19. Write a Python program to convert kilometers to miles.

20. Write a Python program to convert Celsius to Fahrenheit.

21. Write a Python program to check if a number is a prime number.

22. Write a Python program to find the GCD of two numbers.

23. Write a Python program to find the LCM of two numbers.

24. Write a Python program to count the number of vowels in a string.

25. Write a Python program to remove punctuation from a string.

26. Write a Python program to sort words in alphabetical order.

27. Write a Python program to calculate the length of a string.

28. Write a Python program to count the occurrences of a substring in a string.

29. Write a Python program to check if a string is a valid email address.

30. Write a Python program to check if a number is an Armstrong number.

31. Write a Python program to find the Fibonacci series up to a given number.

32. Write a Python program to find the median of three numbers.

33. Write a Python program to check if a string contains only digits.

34. Write a Python program to convert a decimal number to binary.

35. Write a Python program to convert a decimal number to octal.

36. Write a Python program to convert a decimal number to hexadecimal.

37. Write a Python program to find the HCF of two numbers.

38. Write a Python program to find the LCM of two numbers.

39. Write a Python program to print the multiplication table of a given number.

40. Write a Python program to find the sum of squares of the first n natural numbers.

41. Write a Python program to find the cube root of a number.

42. Write a Python program to check if a string is a valid identifier.

43. Write a Python program to find the sum of the series 1+1/2+1/3+...+1/n.

44. Write a Python program to check if a number is a perfect number.

45. Write a Python program to calculate the simple interest.

46. Write a Python program to calculate the compound interest.

47. Write a Python program to find the sum of all numbers in a list.

48. Write a Python program to find the largest number in a list.

49. Write a Python program to find the smallest number in a list.

50. Write a Python program to print all even numbers in a list.