: This method returns the starting index of the first occurrence of letter . If it isn't found, it returns -1 .
The prompt likely refers to from the CodeHS Python curriculum. This exercise requires you to write a function that removes every instance of a specific "letter" (or substring) from a given word. Correct Python Implementation 7.6 / 10 123...
: The while True ensures the code keeps searching until every instance is gone, which is necessary if the letter appears multiple times (e.g., removing "na" from "banana"). Alternative (Standard Python) : This method returns the starting index of
While the CodeHS exercise often requires the manual loop approach above, the simplest way to do this in standard Python is using the .replace() method: This exercise requires you to write a function
: word[:index] takes everything before the letter, and word[index + len(letter):] takes everything after it. Adding them together effectively "deletes" the unwanted part.