Finding the root of a function using Newton's method

newton_method.py

import math

print("Newton's method\n")

A = int(input("Enter value of Xn: "))
X = 0; E = 1

while (True):
	B = 3**(3 * A + 1) - 7 * 5**(2 * A)
	C = math.log(3) * 3**(3 * A + 2) - 14 * math.log(5) * 5**(2 * A)
	X = A - (B / C)
	E = abs(X - A)
	if (E < (10**(-16))):
		break
	else:
		A = X

print("Root of f(x):", X)