Python Program to Find the Square Root

The provided Python program is designed to calculate the square root of a given number. It utilizes the math module, which provides the sqrt function for square root calculations. The program defines a function named find_square_root that takes a numeric input, checks if it is non-negative, and calculates the square root using the math.sqrt function. If the input is negative, the function returns an error message indicating that the square root of a negative number is undefined. In the main part of the program, it prompts the user to enter a number, converts the input to a float, and then calls the find_square_root function with the user-provided value. The result is printed, displaying the square root of the input if it is a non-negative number or an error message for negative inputs. This program provides a straightforward example of how to find the square root in Python, showcasing basic input handling and modular programming.

---

Source code

import math

def find_square_root(number):
    # Check if the number is non-negative
    if number >= 0:
        # Calculate the square root using math.sqrt()
        square_root = math.sqrt(number)
        return square_root
    else:
        # If the number is negative, return an error message
        return "Cannot calculate square root of a negative number."

# Example usage
if __name__ == "__main__":
    # Get user input for the number
    user_input = float(input("Enter a number: "))
    
    # Call the function and print the result
    result = find_square_root(user_input)
    print(f"The square root of {user_input} is: {result}")

---

Description

1. Import the math Module: import math The program begins by importing the math module, which contains various mathematical functions, including sqrt for calculating square roots.
2. Define the find_square_root Function: def find_square_root(number): A function named find_square_root is defined, which takes a single parameter number representing the input value for which the square root needs to be calculated.
3. Check for Non-Negativity: if number >= 0: Within the function, it checks if the input number is non-negative.
4. Calculate Square Root and Return Result: square_root = math.sqrt(number) return square_root If the input is non-negative, the square root is calculated using math.sqrt and returned.
5. Handle Negative Input: else: return "Cannot calculate square root of a negative number." If the input is negative, the function returns an error message indicating that the square root of a negative number is undefined.
6. Example Usage in the Main Part: if __name__ == "__main__": This block checks if the script is being run as the main program.
7. User Input and Function Call: user_input = float(input("Enter a number: ")) result = find_square_root(user_input) The program prompts the user to enter a number, converts the input to a float, and then calls the find_square_root function with the user-provided value.
8. Print Result: print(f"The square root of {user_input} is: {result}") Finally, the program prints the result, displaying the square root of the entered number if it is non-negative, or an error message if the input is negative.

This program demonstrates a modular approach to finding the square root in Python, incorporating input handling and the use of the math module for mathematical calculations.

---

Screenshot

---

Download