Python Square Root Function

How to calculate Square Root in Python ?

In this tutorial, we will learn about Python Square Root Function. Python provides a square root function through the math.sqrt() method, which is part of the math module. This function allows you to calculate the square root of a given number.

Python Square Root Function

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How to use Python Square Root Function

Python’s square root function serves as a mathematical tool that people use to calculate the square root of a number. The square root of a number ‘x’ is a value ‘y’ such that ‘y * y = x’. In Python, you can calculate the square root of a number using the math.sqrt() function from the math module.

Syntax: Square Root Function

import math
result = math.sqrt(x)
  • “Import math”: This statement imports the math module, which houses the sqrt() function for calculating square roots.
  • “The ‘result’ variable”: This variable stores the calculated square root.
  • “Calculating the square root of ‘x’ using math.sqrt(x)”: This expression performs the square root calculation on ‘x,’ which represents the number for which you want to determine the square root.


import math

# Calculate the square root of 16
x = 16
result = math.sqrt(x)

print(f"The square root of {x} is {result}")


The square root of 16 is 4.0
  • To start, we import the math module by using import math.
  • Next, we assign the value of ‘x’ as 16.
  • Subsequently, we calculate the square root of ‘x’ by employing the expression result = math.sqrt(x).
  • In conclusion, we display the result through the print(f"The square root of {x} is {result}") statement, which yields the output “The square root of 16 is 4.0.”

What are the uses of sqrt() in the real world?

  • Measuring Distances: You can use it to find the length of one side of a square or rectangle when you know the area.
  • Engineering and Construction: It helps calculate dimensions for building projects, like determining the length of a diagonal brace in a frame.
  • Finance: In finance, it can be used for things like calculating the standard deviation of an investment’s returns.
  • Science: It’s essential in scientific calculations, such as physics, to determine velocities or forces.
  • Home Improvement: When you need to find the length of a ladder to reach a certain height on a wall or roof.
  • Technology: In computer graphics, it’s used to calculate distances, angles, and sizes of objects on the screen.
  • Education: Students use it in math classes to understand geometry and algebraic concepts.


This function proves valuable across a range of real-world situations, spanning mathematics, science, engineering, finance, and everyday problem-solving. Additionally, it streamlines square root calculations, enhancing their accessibility within Python programs.

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