Python – Uppercase Nth character

The problem of capitalizing a string is quite common and has been discussed many times. But sometimes, we might have a problem like this in which we need to convert the Nth character of string to uppercase. Let’s discuss certain ways in which this can be performed.

Method #1 : Using string slicing + upper()
This task can easily be performed using the upper method which uppercases the characters provided to it and slicing can be used to add the remaining string after the uppercase Nth character.

# Python3 code to demonstrate working of
# Uppercase Nth character
# Using upper() + string slicing

# initializing string
test_str = "GeeksforGeeks"

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

# initializing N
N = 4

# Using upper() + string slicing
# Uppercase Nth character
res = test_str[:N] + test_str[N].upper() + test_str[N + 1:]

# printing result
print("The string after uppercasing Nth character : " + str(res))

Output :

The original string is : GeeksforGeeks
The string after uppercasing Nth character : GeekSforGeeks

Method #2 : Using lambda + string slicing + upper()
The recipe of lambda function has to be added if we need to perform the task of handling None values or empty strings as well, and this becomes essential to handle edge cases.

# Python3 code to demonstrate working of
# Uppercase Nth character
# Using upper() + string slicing + lambda

# initializing string
test_str = "GeeksforGeeks"

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

# initializing N
N = 4

# Using upper() + string slicing + lambda
# Uppercase Nth character
res = lambda test_str: test_str[:N] + test_str[N].upper() + test_str[N + 1:] if test_str else ''

# printing result
print("The string after uppercasing initial character : " + str(res(test_str)))

Output :

The original string is : GeeksforGeeks
The string after uppercasing Nth character : GeekSforGeeks