Calculate Square Root
Calculate the square root of a number using the math module.
BeginnerTopic: Basic Python Programs
What You'll Learn
- Importing and using the math module
- Calling math.sqrt()
- Validating input before performing operations
Python Calculate Square Root Program
This program helps you to learn the fundamental structure and syntax of Python programming.
# Program to calculate the square root of a number
import math
num = float(input("Enter a non-negative number: "))
if num < 0:
print("Square root is not defined for negative numbers in real numbers.")
else:
result = math.sqrt(num)
print("Square root of", num, "is", result)Output
Enter a non-negative number: 16 Square root of 16.0 is 4.0
Step-by-Step Breakdown
- 1Import the math module.
- 2Read a number from the user.
- 3If it is negative, print an error message.
- 4Otherwise, compute math.sqrt(num) and print the result.
Understanding Calculate Square Root
We use the built-in math module which provides math.sqrt():
•For non-negative numbers, it returns the positive square root.
•For negative numbers, we show a friendly message instead of crashing.
This example introduces importing modules and basic error-checking.
Note: To write and run Python programs, you need to set up the local environment on your computer. Refer to the complete article Setting up Python Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your Python programs.