Next
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

Print "Hello, World!" in Python

One print. If this runs, Python is actually installed.

BeginnerBasic Python ProgramsExample 1 of 25
print-hello-world.py
1# if this prints, Python is installed
2print("Hello, World!")

Output

Hello, World!

In this one

  • print() is a full program
  • quotes = string, no quotes = name error

What's going on

print("Hello, World!") is the whole program. No class, no main, no ceremony.

print is built in. Quotes make a string. Drop the quotes and Python looks for a variable named Hello.

Single or double quotes both work. Mixing them in the same string is the thing that blows up.

Run it with python hello.py. The text shows up in the same place you typed the command.

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.

NextAdd Two Numbers