Check the last digit of a number in Python

In this tutorial, we are going to learn about how to check the last digit of a number in Python with the help of examples.

Note: In Python, strings are the sequence of characters, where the index of the first character is 0, the second character is 1, third character is 3 and the last character index -1.

Consider, we have a following number:

pin = 62913

To check the last digit of a number:

1. Convert the number to a string using the str() Function.

2. Use the square brackets syntax [] to access the last character of a string.

3. Convert the result back to a number to get the last digit of the number.

Here is an example:

pin = 67683
last_digit_str = str(pin)[-1]

result = int(last_digit_str) # str to int

if result == 3 :
   print("last digit is 3")
else:
   print("last digit is not 3")

Output:

"last digit is 3"

In the example above, we first converted the number to a string, so that we can use the square brackets syntax [] on it.

You can access the characters of a string, by using the square brackets syntax and specifying an index.

-1 is the index of a last character in the string. At last we have used the int() function to convert the string to a number.

Note: Negative indexes are used to get data from the end of a string.

You can also shorten the above code in a single line like this:

pin = 67683
last_digit = int(str(pin)[-1])

if result == 3 :
   print("last digit is 3")
else:
   print("last digit is not 3")

or You can check the last digit of a number, by dividing the number by 10.

Here is an example:

pin = 67683
last_digit = pin % 10

if result == 3 :
   print("last digit is 3")
else:
   print("last digit is not 3")

Additional resources

You can also check following tutorials in Python:

• How to check if the NumPy array is Empty in Python .

• How check if a list is empty in Python