**cmath.sqrt() Method in Python:**

The cmath.sqrt() method returns the given complex number’s square root.

**Note:** It should be noted that the number must be greater than or equal to 0.

**Syntax:**

cmath.sqrt(x)

**Parameters**

**x:** This is Required. A number whose square root is to be found.

- If the number is less than zero, a ValueError is returned.
- If the value is not a number, a TypeError is returned.

**Return Value:**

Returns a complex value that represents the complex number’s square root.

**Examples:**

**Example1:**

**Input:**

Given Complex Number = 3+4j

**Output:**

The given complex number's (3+4j) square root value = (2+1j)

**Example2:**

**Input:**

Given realpart = 5 Given imaginary part = 2

**Output:**

The given complex number's (5+2j) square root value = (2.27872385417085+0.4388421169022545j)

**Note:** The above input format is for dynamic input.

## cmath.sqrt() Method with Examples in Python

### Method #1: Using Built-in Functions (Static Input)

**Approach:**

- Import cmath module(for complex number operations) using the import keyword.
- Give the complex number as static input and store it in a variable.
- Pass the given complex number as an argument to the cmath.sqrt() method that returns the given complex number’s square root value.
- Store it in another variable.
- Print the square root value of the given complex number.
- The Exit of the Program.

**Below is the implementation:**

# Import cmath module(for complex number operations) using the import keyword. import cmath # Give the complex number as static input and store it in a variable. complexnumb = 3+4j # Pass the given complex number as an argument to the cmath.sqrt() method that # returns the the given complex number's square root value. # Store it in another variable. rslt = cmath.sqrt(complexnumb) # Print the square root value of the given complex number. print("The given complex number's", complexnumb, "square root value = ") print(rslt)

**Output:**

The given complex number's (3+4j) square root value = (2+1j)

Similarly, try for the other examples

import cmath complexnumb = 12 rslt = cmath.sqrt(complexnumb) print("The given complex number's", complexnumb, "square root value = ") print(rslt)

**Output:**

The given complex number's 12 square root value = (3.4641016151377544+0j)

### Method #2: Using Built-in Functions (User Input)

**Approach:**

- Import cmath module(for complex number operations) using the import keyword.
- Give the real part and imaginary part of the complex number as user input using map(), int(), split().
- Store it in two variables.
- Using a complex() function convert those two variables into a complex number and store them in a variable.
- Pass the given complex number as an argument to the cmath.sqrt() method that returns the given complex number’s square root value.
- Store it in another variable.
- Print the square root value of the given complex number.
- The Exit of the Program.

**Below is the implementation:**

# Import cmath module(for complex number operations) using the import keyword. import cmath # Give the real part and imaginary part of the complex number as user input # using map(), int(), split(). # Store it in two variables. realnumb, imaginarynumb = map(int, input( 'Enter real part and complex part of the complex number = ').split()) # Using a complex() function convert those two variables into a complex number. complexnumb = complex(realnumb, imaginarynumb) # Pass the given complex number as an argument to the cmath.sqrt() method that # returns the the given complex number's square root value. # Store it in another variable. rslt = cmath.sqrt(complexnumb) # Print the square root value of the given complex number. print("The given complex number's", complexnumb, "square root value = ") print(rslt)

**Output:**

Enter real part and complex part of the complex number = 5 2 The given complex number's (5+2j) square root value = (2.27872385417085+0.4388421169022545j)