How to fix “IndexError: list index out of range” in Python? [closed]

IndexError: list index out of range occurs when you try to access a list index that does not exist. Python list indexing starts from 0 and ends at length−1.

Example causing error:

numbers = [10, 20, 30]

print(numbers[3]) # invalid index

Correct way:

numbers = [10, 20, 30]

for num in numbers:

Fix:

Check length using len(list)

Avoid accessing index ≥ len(list)

Prefer direct iteration over lists