Several example codes

Program Overview

This Python program displays a four-option menu:
1. Calculate one
2. Calculate two
3. Calculate three
4. Exit
If the user selects option 1, the program performs a specific calculation and displays the result.

Python Code:

def calculate_one():
    # Example: compute a simple expression
    x = float(input("Enter value for x: "))
    result = (x ** 2 + 3 * x + 1) / (x + 1)
    print(f"Result of calculation one: {result:.4f}")

def show_menu():
    print("1. Calculate one")
    print("2. Calculate two")
    print("3. Calculate three")
    print("4. Exit")

def main():
    while True:
        show_menu()
        choice = input("SELECT (1 to 4): ")
        if choice == "1":
            calculate_one()
        elif choice == "2":
            print("Calculation two not implemented yet.")
        elif choice == "3":
            print("Calculation three not implemented yet.")
        elif choice == "4":
            print("Exiting program.")
            break
        else:
            print("Invalid choice. Please enter a number from 1 to 4.")

main()

Sample Output:

1. Calculate one  
2. Calculate two  
3. Calculate three  
4. Exit  
SELECT (1 to 4): 1  
Enter value for x: 2  
Result of calculation one: 3.6667