PythonHow-ToBeginner · 3 min read

How to Read Input as Integer in Python: Simple Guide

To read input as an integer in Python, use the input() function to get user input as a string, then convert it to an integer using int(). For example, number = int(input()) reads input and stores it as an integer.

📐

Syntax

The basic syntax to read an integer input is:

input(): Reads user input as a string.
int(): Converts the string input to an integer.
Assign the result to a variable to use the integer value.

python

number = int(input())

💻

Example

This example asks the user to enter a number, reads it as an integer, and prints it back with a message.

python

number = int(input("Enter a number: "))
print("You entered:", number)

Output

Enter a number: 42 You entered: 42

⚠️

Common Pitfalls

Trying to convert non-numeric input to an integer causes an error. For example, entering letters will raise a ValueError. Always ensure the input is numeric or handle errors with try-except.

python

try:
    number = int(input("Enter a number: "))
    print("You entered:", number)
except ValueError:
    print("That's not a valid integer!")

Output

Enter a number: abc That's not a valid integer!

📊

Quick Reference

Function	Purpose
input()	Reads user input as a string
int()	Converts string input to an integer
try-except	Handles invalid input errors

✅

Key Takeaways

Use int(input()) to read and convert input to an integer in one step.

input() always returns a string, so conversion is necessary for numbers.

Invalid input causes ValueError; handle it with try-except to avoid crashes.

Prompt users clearly to enter numeric input to reduce errors.