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You can solve this using a while loop to repeatedly find and remove the target substring until it no longer exists in the word.

: 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) 7.6 / 10 123...

: word[:index] takes everything before the letter, and word[index + len(letter):] takes everything after it. Adding them together effectively "deletes" the unwanted part. You can solve this using a while loop

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 Adding them together effectively "deletes" the unwanted part

: If letter is an empty string, the loop would run forever; we return the original word immediately.

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: