[Solved] IndexError: list index out of range – for i in arr1 and arr2 [duplicate]

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This could be one way of doing it:

def find_missing(arr1, arr2):

    # Set longer array to lst1, shorter to lst2 
    if len(arr1) > len(arr2):
        lst1 = arr1
        lst2 = arr2
    else:
        lst1 = arr2
        lst2 = arr1

    # Go through elements in longer list
    for element in lst1:

        # If this element is not in lst2, we found it, return result
        if element not in lst2:
            return element

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solved IndexError: list index out of range – for i in arr1 and arr2 [duplicate]