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Python

Learn Python for data science and backend development.

1

Hello World

Python uses print() to output text. It’s one of the simplest and most readable languages.

Example

Run this example to see how it works and then try the exercise.

example.py
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Output
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Exercise

Your task: Print "Hello, World!" using the print() function

main.py
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Output
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Quiz

Which function prints output in Python?

SUMMARY

In this section, you learned how to print output to the console. Next, you’ll learn how to declare variables and work with different data types.

2

Variables and Types

Python infers types automatically. No need to declare types explicitly!

Example

Run this example to see how it works and then try the exercise.

example.py
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Output
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Exercise

Your task: Create variables: name (string), age (int), is_learning (bool)

main.py
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Output
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Quiz

How do you check the type of a variable in Python?

SUMMARY

In this section, you learned how to declare variables and work with different data types. Next, you’ll learn how to format strings using f-strings.

3

String Formatting

Python offers multiple ways to format strings. F-strings (Python 3.6+) are the most modern and readable.

Example

Run this example to see how it works and then try the exercise.

example.py
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Output
Click "Run" to see the example in action...
Exercise

Your task: Use an f-string to print "Welcome, Pythonista!"

main.py
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Output
Click "Run" to execute your code...
Quiz

What prefix is used for f-strings in Python?

SUMMARY

In this section, you learned how to format strings using f-strings. Next, you’ll learn how to perform mathematical operations.

Unlock 10 More Lessons

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Locked lessons:
  • Arithmetic Operations
  • Conditionals
  • For Loops
  • While Loops
  • Functions
  • Lists
  • List Comprehensions
  • Dictionaries
  • Tuples
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