Python: Lowercase first n characters in a string

Last update on April 19 2025 13:05:20 (UTC/GMT +8 hours)

Lowercase first n characters of string.

Write a Python program to lowercase the first n characters in a string.

Sample Solution:

Python Code:

# Define a string 'str1'.
str1 = 'W3RESOURCE.COM'

# Convert the first four characters of the string to lowercase and concatenate them with the remaining characters.
# Print the modified string.
print(str1[:4].lower() + str1[4:])

Sample Output:

w3reSOURCE.COM                    

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to convert the first n characters of an input string to lowercase using slicing.
• Write a Python program to implement a function that lowercases the first n characters and leaves the rest unchanged.
• Write a Python program to use a loop to process and convert only the first n characters of a string to lowercase.
• Write a Python program to conditionally apply lower() to the first n characters of a string if n is less than the string's length.

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• Python Data Type String Exercises Home ↩
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