Type checking using type() in Python

Introduction

Sometimes, you want to know what kind of data you have. The type() function helps you find out if a value is a number, text, or something else.

When you want to check if a user entered a number or text.

When you need to handle data differently based on its type.

When debugging to understand what kind of data a variable holds.

When writing functions that behave differently for different data types.

Syntax

Python

type(object)

The object can be any value or variable you want to check.

type() returns the type of the object, like for numbers.

Examples

Checks the type of the number 5, which is an integer.

Python

type(5)

Checks the type of the text 'hello', which is a string.

Python

type('hello')

Checks the type of a list of numbers.

Python

type([1, 2, 3])

Sample Program

This program checks and prints the types of three different variables: a number, a string, and a list.

Python

a = 10
b = 'apple'
c = [1, 2, 3]

print(type(a))
print(type(b))
print(type(c))

Important Notes

type() shows the exact type, including built-in types like int, str, list, and custom classes.

Use type() to compare types, but for checking if something is a type or subclass, isinstance() is often better.

Summary

type() tells you the kind of data stored in a variable.

It helps you write code that works correctly with different data types.

Use it to understand and debug your programs.