square root in python from scratch code example

Example 1: how to do a square root in python

a = int(input("enter a real number: "))
sqrt = a**(1/2)
print("the square root of ",a ,"is",sqrt)

Example 2: square root in python

def square_root(num):
  	return num**0.5
#prints out 4
print(square_root(16))
#prints out 10
print(square_root(100))