Estimates a square root using newton's method.

newtons_square.py

def mySqrt (a, precision):
    curr_guess = a/2
    last_guess = curr_guess*2
    iterations = 1
    
    while (abs(last_guess - curr_guess) > precision):
        last_guess = curr_guess
        curr_guess = (a/curr_guess + curr_guess)/2
        iterations+=1
    print("Square root for {0} is {1}".format(a, curr_guess))
    return curr_guess

if __name__ == "__main__":
    a = float(raw_input("Input a float: "))
    epsilon = float(raw_input("Input precision: "))
    mySqrt(a, epsilon)