1.) Python program to print message "Hello, World!". print("Hello, World!") 2.) Python program to check if a Number is Even or Odd. num = int(input("Enter a number: ")) if num % 2 == 0: print(f"{num} is an even number.") else: print(f"{num} is an odd number.") 3.) Python program to find the Sum of Two Numbers. num1 = float(input("Enter the first number: ")) num2 = float(input("Enter the second number: ")) sum = num1 + num2 print(f"The sum of {num1} and {num2} is {sum}.") 4.) Python program to calculate Factorial of a Number. num = int(input("Enter a Positive Integer Number: ")) factorial = 1 if num < 0: print("Factorial does not exist for negative numbers.") elif num == 0: print("The factorial of 0 is 1.") else: for i in range(1, num + 1): factorial *= i print(f"The factorial of {num} is {factorial}.") 5.) Python program for Simp...