Day 65 : Python Program to Remove the nth Index Character from a Non Empty String

 

def remove_nth_index_char(input_string, n):

    """

    Remove the character at the nth index from the input string.

Args:

        input_string (str): The string to process.

        n (int): The index of the character to remove.

Returns:

        str: A new string with the nth character removed.

    """

    if n < 0 or n >= len(input_string):

        raise ValueError("Index n is out of range.")

    return input_string[:n] + input_string[n+1:]

if __name__ == "__main__":

    input_string = input("Enter a non-empty string: ")

    try:

        n = int(input("Enter the index of the character to remove: "))

        result = remove_nth_index_char(input_string, n)

        print("String after removing the nth index character:", result)

    except ValueError as e:

        print("Error:", e)

#source code --> clcoding.com

Code Explanation:

Function: 

remove_nth_index_char

Purpose:

To return a new string where the character at the specified index n is removed.

Arguments:

input_string (str): The original string from which a character is to be removed.

n (int): The index of the character to remove.

Logic:

Index Validation:

if n < 0 or n >= len(input_string):

Checks if n is outside the valid range of indices for the string.

If n is negative or greater than or equal to the length of the string, it raises a ValueError with the message: "Index n is out of range."

String Manipulation:

input_string[:n]: Slices the string to include all characters before index n.

input_string[n+1:]: Slices the string to include all characters after index n.

input_string[:n] + input_string[n+1:]: Combines the two slices, effectively removing the character at index n.

Return Value:

A new string with the character at the nth index removed.

Main Script:

The if __name__ == "__main__": block allows this script to run only when executed directly, not when imported as a module.

Step-by-Step Execution:

Input:

Prompts the user to enter a non-empty string with input("Enter a non-empty string: ").

Prompts the user to specify the index (n) of the character they want to remove with int(input("Enter the index of the character to remove: ")).

Validation and Function Call:

The script calls remove_nth_index_char with the provided string and index.

If the index is invalid (e.g., out of range), a ValueError is raised, and the except block catches it.

Error Handling:

If an exception occurs (e.g., invalid index), it prints an error message: Error: Index n is out of range.

Output:

If the function executes successfully, it prints the new string with the character removed:

String after removing the nth index character: <new_string>