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Function to Alter a Character in a String in Python

In this exercise, you will develop a Python program with a function called "change_char" to alter a character at a specific position (0-based index) in a string, replacing it with another character. This exercise is perfect for practicing function definition, string manipulation, and indexing in Python. By implementing this function, you will gain hands-on experience in handling function definitions and string manipulation in Python. This exercise not only reinforces your understanding of functions but also helps you develop efficient coding practices for managing user interactions.



Group

Mastering Functions in Python

Objective

Develop a Python program with a function called "change_char" to alter a character at a specific position (0-based index) in a string, replacing it with another character.

For example:

sentence = "Tomato" change_char(sentence, 5, "a")

Example Python Exercise

 Copy Python Code 
# Define the function to change a character at a specific position
def change_char(sentence, position, new_char):
    # Convert the string to a list of characters (since strings are immutable)
    sentence_list = list(sentence)
    
    # Replace the character at the specified position with the new character
    sentence_list[position] = new_char
    
    # Convert the list back to a string and return it
    return ''.join(sentence_list)

# Main function to test the change_char function
def main():
    sentence = "Tomato"
    # Call change_char to replace the character at index 5 with 'a'
    result = change_char(sentence, 5, "a")
    print(result)  # Expected output: "Tomata"

# Call the main function to execute the program
main()

 Output

Tomata

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