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Convert Pounds to Kilograms: A Simple Python Program

This program allows users to convert pounds to kilograms using Python. By providing the number of pounds (as an integer or floating-point number), the program calculates the equivalent weight in kilograms based on the conversion rate of 2.2 pounds per kilogram. The user is prompted to enter the weight, and the program outputs the result, clearly labeled. This example illustrates fundamental programming concepts, including user input, variable assignment, arithmetic operations, and output formatting. Ideal for beginners learning to develop and test programs.

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Convert Pounds to Kilograms: A Simple Python Program

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  1. Computer Science 111 Fundamentals of Programming I Developing and Testing Programs

  2. Start with a User Request Write a program that converts pounds to kilograms.

  3. Determine the Inputs and Outputs • The input will be the number of pounds, as an integer or floating-point number • The output will be • a prompt for the number of pounds • A label, and the number of kilograms as a floating-point number

  4. Example Session with the Program Enter the number of pounds: 330 The number of kilograms is 150.0

  5. Gather Information About the Problem There are 2.2 pounds in a kilogram

  6. Design the Algorithm in Pseudocode Prompt the user for the number of pounds Input pounds Set kilograms to pounds / 2.2 Output the number of kilograms

  7. Code as the convert Script """ File: convert.py This program converts pounds to kilograms. Input: the number of pounds, as an integer or float. Output: the number of kilograms, as a float, suitably labeled. """ convert.py Start with the prefatory docstring, not as an afterthought!!!

  8. Code as the convert Script pounds = float(input('Enter the number of pounds: ')) kilograms = pounds / 2.2 print('The number of kilograms is', kilograms) convert.py The Python shell Test the program in IDLE first!

  9. Test with Several Inputs pounds = float(input('Enter the number of pounds: ')) kilograms = pounds / 2.2 print('The number of kilograms is', kilograms) convert.py The Python shell

  10. Then Test in a Terminal Window pounds = float(input('Enter the number of pounds: ')) kilograms = pounds / 2.2 print('The number of kilograms is', kilograms) convert.py The terminal

  11. For Monday Start Chapter 3

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