For positive numbers using exponent **

# Note: change this value for a different result

num = 8

# uncomment to take the input from the user

#num = float(input(‘Enter a number: ‘))

num_sqrt = num ** 0.5

print(‘The square root of %0.3f is %0.3f’%(num ,num_sqrt))

# Import the complex math module

import cmath

# change this value for a different result

num = 1+2j

# uncommment to take input from the user

#num = eval(input(‘Enter a number: ‘))

num_sqrt = cmath.sqrt(num)

print(‘The square root of {0} is {1:0.3f}+{2:0.3f}j’.format(num,num_sqrt.real,num_sqrt.imag))

Notice that we have used the eval() function instead of float() to convert complex number as well. Also notice the way in which the output is formatted.