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Getting "Target not found in list" for target 6
Here is my code. I cannot understand why 6 produces "Target not found in list" message when calling the last verify.
def linear_search(list, target): """ Returns the index position of the target if found, else returns None. """
for i in range(0, len(list)): if list[i] == target: return i return None
def verify(index): if index is not None: print("Target found at index: ", index) else: print("Target not found in list")
numbers = [1,2,3,4,5,6,7,8,9,10]
result = linear_search(numbers, 12) verify(result)
result = linear_search(numbers, 6) verify(result)
The return statement exits immediately, so in linear_search anything other than the first list item (1) will return target not found. Think of
return None as an else statement that will only execute once and halt the loop.