How to Convert String to Integer in Python

Written by Rahul, Updated on November 26, 2020

Its a common uses of type conversion in any programming language. Python also provides inbuilt methods for type conversion. This tutorial will help to convert a string value to integer value with Python.

Python Convert String to Int

Using the Python programming language you can use int() function to convert string value to int numeric value. Here is the sample Python code to convert string to lower case.

Open a Python shell to run tests below:

>>> s = '10'

#Check the type of the variable
>>> type(s)
<type 'str'>


#Convert String to Int
>>> s = int(s)

#Again check the type of the variable
>>> type(s)
<type 'int'>

>>> s = '10'

#Check the type of the variable

>>> type(s)

#Convert String to Int

>>> s = int(s)

#Again check the type of the variable

>>> type(s)

The input must be contain number values (0-9), nothing else.

For example, if the input value contains non-numeric values (like: alphabets, symbols) will throw an error with invalid literal. See the example below:

>>> s = '10e'
>>>
>>> s = int(s)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '10v0'

>>> s = '10e'

>>>

>>> s = int(s)

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

ValueError: invalid literal for int() with base 10: '10v0'

How to Convert String to Integer in Python

Python Convert String to Int

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Rahul

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