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

The cmath.isfinite() method determines whether or not a given complex value is finite.

This method gives the following Boolean value: If the value is finite, True; otherwise, False.

**Syntax:**

cmath.isfinite(x)

**Parameters**

**x: **This is Required. It is the value that is used to determine whether it is finite or not.

**Return Value:**

Returns a boolean value that is True if the value is finite and False otherwise.

**Examples:**

**Example1:**

**Input:**

Given Complex Number = float('inf')+ 7j

**Output:**

Check if the given complex number (inf+7j) is finite or not = False

**Example2:**

**Input:**

Given realpart = 5 Given imaginary part = 2

**Output:**

Check if the given complex number (5+2j) is finite or not = True

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

## cmath.isfinite() 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.isfinite() method that returns a boolean value that is True if the given complex number is finite and False otherwise.
- Store it in another variable.
- Print the above result after checking if the given complex number is finite or not.
- 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.isfinite() method # that returns a boolean value that is True if the given complex number is # finite and False otherwise. # Store it in another variable. rslt = cmath.isfinite(complexnumb) # Print the above result after checking if the given complex number is finite or not. print("Check if the given complex number", complexnumb, "is finite or not = ", rslt)

**Output:**

Check if the given complex number (3+4j) is finite or not = True

Similarly, try for the other examples

import cmath complexnumb = complex(3, float('inf')) rslt = cmath.isfinite(complexnumb) print("Check if the given complex number", complexnumb, "is finite or not = ", rslt)

**Output:**

Check if the given complex number (3+infj) is finite or not = False

import cmath complexnumb = float('inf')+ 7j rslt = cmath.isfinite(complexnumb) print("Check if the given complex number", complexnumb, "is finite or not = ", rslt)

**Output:**

Check if the given complex number (inf+7j) is finite or not = False

### 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.isfinite() method that returns a boolean value that is True if the given complex number is finite and False otherwise.
- Store it in another variable.
- Print the above result after checking if the given complex number is finite or not.
- 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.isfinite() method # that returns a boolean value that is True if the given complex number is # finite and False otherwise. # Store it in another variable. rslt = cmath.isfinite(complexnumb) # Print the above result after checking if the given complex number is finite or not. print("Check if the given complex number", complexnumb, "is finite or not = ", rslt)

**Output:**

Enter real part and complex part of the complex number = 5 2 Check if the given complex number (5+2j) is finite or not = True