Main Function Parameters and Summation - Python Programming Exercise

In this exercise, you will develop a Python program named "sum" that takes two integer numbers from the command line and prints their sum. This exercise is perfect for practicing command-line input handling and arithmetic operations in Python. By implementing this program, you will gain hands-on experience in handling command-line input and performing arithmetic operations in Python. This exercise not only reinforces your understanding of command-line input handling but also helps you develop efficient coding practices for managing user interactions.

 Category

Mastering Functions

 Exercise

Main Function Parameters And Summation

 Objective

Develop a Python program named "sum" that takes two integer numbers from the command line and prints their sum. For example, if you run the program with the command sum 5 3, it should output 8.

 Example Python Exercise

 Copy Python Code 
import sys

# Define the sum function
def sum_numbers(a, b):
    return a + b

# Main function to handle command line input
def main():
    # Check if we have exactly two arguments (excluding the script name)
    if len(sys.argv) != 3:
        print("Please provide exactly two numbers.")
        return

    try:
        # Parse the command line arguments as integers
        num1 = int(sys.argv[1])
        num2 = int(sys.argv[2])

        # Calculate and print the sum
        result = sum_numbers(num1, num2)
        print(result)

    except ValueError:
        # Handle the case where the inputs are not valid integers
        print("Please provide valid integer numbers.")

# Call the main function to execute the program
if __name__ == "__main__":
    main()

 Output

python sum.py 5 3

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