Python - Test if Kth character is digit in String

Python – Test if Kth character is digit in String

Last Updated : 05 Sep, 2020

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

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