How to find a square root of a number in python

              When a number is multiplied with same number, it is called square. Square root means the number is factorised with two same numbers.

Eg:

The square root of 25 is 5.

(5x5 = 25).

The square root is represented by √.

Python implementation:

              Python uses the following modules and methods to find the square root of a number.

1. ‘exponentiation’ method
2.   ‘math’ module
3.    ‘cmath’ module
4.   ‘numpy’ module.

Let us briefly discuss each method.

1. ‘exponentiation’ method:

      This method uses the concept ‘exponent’.

>>> no = 81

>>> sqrt = no ** 0.5

>>> print("The Square root of the number is:", sqrt)

      Output: The Square root of the number is: 9.0

      Note : It returns float value.

2. ‘math’ module :

     This method uses the built-in module ‘math’.

>>> import math

>>> no = 81

>>> sqrt = math.sqrt(no)

>>> print("The Square root of the number is:", sqrt)

      Output: The Square root of the number is: 9.0

      Note: This is suitable for non -negative number.

3. ‘cmath’ module:

      If you want to find the square root to a complex number, this module is helpful to you.

>>>import cmath

>>> no = -81

>>> sqrt = cmath.sqrt(no)

>>> print("The Square root of the number is:", sqrt)

      Output: The Square root of the number is: 9j

4. ‘numpy’ Module

     This module is used for advanced Data operations. It is suitable for array also.

>>>import numpy as np

>>> no = 81

>>> sqrt = np.sqrt(no)

>>> print("The Square root of the number is:", sqrt)

      Output: The Square root of the number is: 9j

      Note : This method is useful in scientific operations.

That’s all. these are four different ways of finding square root of a number in python. Hope, you understand the concept. Keep coding!!!!