How to convert a string to an integer in Python

In this tutorial, we are going to learn how to convert the string to an integer in Python.

Consider, we have a following integer in our code:

num = "21"

Now, we need to convert the above string "21" to a integer 21.

Converting string to integer

To convert a string to an integer, we can use the built-in int() function in Python.

Here is an example, that converts the string 21 to an integer:

a = '21'

print(int(a))  # prints number 21

Output:

21