Learn the Bisection Method by Finding the Square Root of a Number - Step 17

Python
1

Tell us what’s happening:

Hello, I am not sure what I have done wrong here? The error keeps saying I have to create an if statement which I have done, but not letting me pass the test?

Your code so far

def square_root_bisection(square_target, tolerance=1e-7, max_iterations=100):
    if square_target < 0:
        raise ValueError('Square root of negative number is not defined in real numbers')
    if square_target == 1:
        root = 1
        print(f'The square root of {square_target} is 1')
    elif square_target == 0:
        root = 0
        print(f'The square root of {square_target} is 0')

    else:
        low = 0
        high = max(1, square_target)
        root = None
        
        for _ in range(max_iterations):
            mid = (low + high) / 2
            square_mid = mid**2

            if abs(square_mid - square_target) < tolerance:
                root = mid
                break

            elif square_mid < square_target:
                low = mid
            else:
                high = mid


# User Editable Region

    if root is None:
        print(f'Failed to converge within {max_iterations} iterations.')

# User Editable Region

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Challenge Information:

Learn the Bisection Method by Finding the Square Root of a Number - Step 17

2

Outside the for loop,

Sounds like it should be outside the for loop, but still within the else:

3

Thanks so much that was it!

1 Like