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Python Basics · Lesson 3 of 56

Datatypes

Source: 1-Python Basics/1.2-Datatypes.ipynb

Start here — no coding background needed

What you will learn

Know the main kinds of data: text, whole numbers, decimals, and true/false.

In simple words

Text uses quotes. Whole numbers count things. Decimals measure things. True/False answer yes-or-no questions.

Think of it like this

Form fields: name (text), quantity (number), paid? (yes/no).

Words to know:

  • str — Text — always in quotes
  • int / float — Numbers — with or without decimal point
  • bool — True or False only

Start here if you have never coded. We use everyday examples — no jargon without explanation.

Easy example — try this first

Easy example — run this first. Change values and press Run again.

Python

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference notes (from full bootcamp)

Optional — deeper detail for when you are ready

DataTypes

1. Definition:

  • Data types are a classification of data which tell the compiler or interpreter how the programmer intends to use the data.
  • They determine the type of operations that can be performed on the data, the values that the data can take, and the amount of memory needed to store the data.

2. Importance of Data Types in Programming

Explanation:

  • Data types ensure that data is stored in an efficient way.
  • They help in performing correct operations on data.
  • Proper use of data types can prevent errors and bugs in the program.

Video Outline:

  1. Introduction to Data Types
  2. Importance of Data Types in Programming
  3. Basic Data Types

- Integers

- Floating-point numbers

- Strings

- Booleans

  1. Advanced Data Types

- Lists

- Tuples

- Sets

- Dictionaries

  1. Type Conversion
  2. Practical Examples
Reference example
Python
Output
Expected (from notebook):
int

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python
Output
Expected (from notebook):
5.11
<class 'float'>

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python
Output
Expected (from notebook):
Anshul
<class 'str'>

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python
Output
Expected (from notebook):
bool

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python
Output
Expected (from notebook):
bool

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Reference example
Python
Output
Expected (from notebook):
Hello5

Runs in your browser via Pyodide — no server. First run may take a few seconds.

Practice test — try yourself

Write code, press Check. Wrong answer shows the correct code to copy & run.

item = "Pen", qty = 2, price = 25. Print one line: Pen x 2 = 50

Hint: Use qty * price for total.

Python