Question: Find the largest among root and children largest = i l = 2 * i + 1 r = 2 * i

Find the largest among root and children
largest = i
l = 2 * i + 1
r = 2 * i + 2

if l < n and arr[i] < arr[l]:
largest = 1

if r < n and arr[largest] < arr[r]:
largest = r

I am getting an error message that says below:

Traceback (most recent call last):
File "", line 10, in
NameError: name 'l' is not defined

This is my code:

def heapify(arr, n, i):

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