Python Program to Calculate the Square Root

Introduction

Calculating the square root of a number is a common mathematical operation in programming. This tutorial will guide you through creating a Python program that computes the square root of a given number using Python’s built-in functionality.

Problem Statement

Create a Python program that:

• Takes a number as input.
• Calculates the square root of the number.
• Displays the square root.

Example:

• Input: 16
• Output: The square root of 16 is 4.0

Solution Steps

1. Take Input from the User: Use the input() function to get a number from the user.
2. Convert Input to Numeric Value: Convert the input string to a float using float() to handle both integers and decimal numbers.
3. Calculate the Square Root: Use the math.sqrt() function to calculate the square root.
4. Display the Result: Use the print() function to display the square root.

Python Program

# Python Program to Calculate the Square Root
# Author: https://www.javaguides.net/

import math

# Step 1: Take input from the user
num = float(input("Enter a number: "))

# Step 2: Calculate the square root
square_root = math.sqrt(num)

# Step 3: Display the result
print(f"The square root of {num} is {square_root}")

Explanation

Step 1: Take Input from the User

• The input() function prompts the user to enter a number. The input is converted to a float using float() to accommodate both integer and decimal inputs.

Step 2: Calculate the Square Root

• The math.sqrt() function from Python’s math module is used to calculate the square root of the number.

Step 3: Display the Result

• The print() function is used to display the square root. The f-string format is used to include the original number and its square root directly within the string.

Output Example

Example:

Enter a number: 16
The square root of 16 is 4.0

Example:

Enter a number: 7.5
The square root of 7.5 is 2.7386127875258306

Conclusion

This Python program demonstrates how to calculate the square root of a number using the math.sqrt() function. It is a useful exercise for beginners to understand how to work with mathematical functions and handle user input in Python.