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1. Print "Hello, World!"2. Add Two Numbers3. Swap Two Variables4. Find ASCII Value of a Character5. Check Even or Odd6. Find Largest of Two Numbers7. Find Largest of Three Numbers8. Check Positive, Negative, or Zero9. Convert Kilometers to Miles10. Convert Celsius to Fahrenheit11. Calculate Area of a Triangle12. Calculate Simple Interest13. Calculate Compound Interest14. Calculate Square Root15. Convert Seconds to Hours, Minutes, and Seconds16. Calculate Body Mass Index (BMI)17. Check Leap Year18. Find Absolute Value19. Calculate Age from Birth Year20. Sum of First N Natural Numbers21. Calculate Power Without Using pow()22. Print Multiplication Table23. Convert Decimal to Binary24. Convert Binary to Decimal25. Calculate Electricity Bill

Convert Kilometers to Miles in Python

Multiply by 0.621371. Put the magic number in a named variable so you can find it later.

BeginnerBasic Python ProgramsExample 9 of 25
convert-kilometers-to-miles.py
1# Program to convert kilometers to miles
2

3kilometers = float(input("Enter distance in kilometers: "))
4

5conversion_factor = 0.621371  # 1 kilometer = 0.621371 miles
6miles = kilometers * conversion_factor
7

8print(kilometers, "km is equal to", miles, "miles")

Output

Enter distance in kilometers: 5
5.0 km is equal to 3.106855 miles

In this one

  • name the 0.621371, don't bury it
  • round() if you don't want six decimal places

What's going on

1 km ≈ 0.621371 miles. Multiply. That's it.

The named conversion_factor is the useful part. Hard-coding 0.621371 in the print line is how you get a typo you can't search for.

The miles value will look ugly (3.106855). round(miles, 2) if you want it to look like a road sign.

After this program

If the idea is still fuzzy, read Day 1: Introduction to Python in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 basic python programs, or see every topic on Python exercises.

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