Python - Test if Kth character is digit in String

Given a String, check if Kth index is a digit.

Input : test_str = ‘geeks9geeks’, K = 5
Output : True
Explanation : 5th idx element is 9, a digit, hence True.

Input : test_str = ‘geeks9geeks’, K = 4
Output : False
Explanation : 4th idx element is s, not a digit, hence False.

Method #1 : Using in operator

In this, we create a string of numerics and then use in operator to check if Kth digit lies in that numeric string.

Python3

# Python3 code to demonstrate working of  
# Test if Kth charater is digit in String 
# Using in operator 
  
# initializing string 
test_str = 'geeks4geeks'
  
# printing original String 
print("The original string is : " + str(test_str)) 
  
# initializing K 
K = 5
  
# checking if Kth digit is string  
# getting numeric str 
num_str = "0123456789"
res = test_str[K] in num_str 
  
# printing result  
print("Is Kth element String : " + str(res))  

Output

The original string is : geeks4geeks
Is Kth element String : True

Method #2 : Using isdigit()

In this, we use inbuilt Py. function to solve this problem, and check if Kth element is digit.

Python3

# Python3 code to demonstrate working of  
# Test if Kth character is digit in String 
# Using isdigit() 
  
# initializing string 
test_str = 'geeks4geeks'
  
# printing original String 
print("The original string is : " + str(test_str)) 
  
# initializing K 
K = 5
  
# isdigit checks for digit 
res = test_str[K].isdigit() 
  
# printing result  
print("Is Kth element String : " + str(res))  

Output

The original string is : geeks4geeks
Is Kth element String : True

My Personal Notes

Recommended Posts:

manjeet_04

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.