Python | Check Numeric Suffix in String

Sometimes, while programming, we can have such a problem in which we need to check if any string is ending with a number i.e it has a numeric suffix. This problem can occur in Web Development domain. Let’s discuss certain ways in which this problem can be solved.

Method #1 : Using regex
This problem can be solved using regex. The search and group function can perform the task of searching the suffix string and printing the number, if it is required.

# Python3 code to demonstrate working of
# Check Numeric Suffix in String
# Using regex
import re

# initializing string
test_str = "Geeks4321"

# printing original string
print("The original string is : " + str(test_str))

# Using regex
# Check Numeric Suffix in String
res = re.search(r'\d+$', test_str)

# printing result
print("Does string contain suffix number ? : " + str(bool(res)))

Output :

The original string is : Geeks4321
Does string contain suffix number ? : True

Method #2 : Using isdigit()
The isdigit function can be used to perform this particular task using the fact that if a number at the end, means its very last character is going to be a number, so by just checking the last character, we can prove that a string ends with a number.

# Python3 code to demonstrate working of
# Check Numeric Suffix in String
# Using isdigit()

# initializing string
test_str = "Geeks4321"

# printing original string
print("The original string is : " + str(test_str))

# Using isdigit()
# Check Numeric Suffix in String
res = test_str[-1].isdigit()

# printing result
print("Does string contain suffix number ? : " + str(res))

Output :

The original string is : Geeks4321
Does string contain suffix number ? : True