Question

Part 1

Encapsulate the following Python code from Section 7.5 in a function named my_sqrt that takes a as a parameter, chooses a starting value for x, and returns an estimate of the square root of a. 

while True:

   y = (x + a/x) / 2.0

   if y == x:

     break

   x = y 

Answer 1

def my_sqrt(a):
    x = a
    while True:
        y = (x + a/x) / 2.0
        if y == x:
            break
        x = y 
    return x

print('my_sqrt(2) =', my_sqrt(2))