Python

Python Math Sqrt

One of the explanations that Python is still the most widely used language is its extensive language features. Built-in functions in Python are an outstanding feature, as they assist programmers with a range of tasks.

Working as a coder has the advantage of ensuring that you never go without a calculator. There are several functions in all computer languages that allow you to conduct various numerical mathematical computations. Let’s say we want to calculate the square root of a number. The variable y equals the number x when multiplied by itself: x = y * y or x = y2.

The sqrt() method in Python calculates the sqrt of a value.  The sqrt of a single number multiplied by itself to make a series. We really need a math module to call the sqrt function in the Python programming language because it is not utilized directly to get the square root of a given value.

An important point related to the topic is given below:

  • The exponentiation operator in Python can be used to find root values.
  • The exponentiation operator in Python can be used to calculate square roots by elevating variables to a power of 1/2.
  • It’s easy to forget about operator precedence, leading to an issue.
  • The square root function is also available in Python’s standard library’s math module.

Example 01:

The square root of 9, 25, 81, 90, and 100 values is obtained using a Python program in this example. Consider the following code and its result:

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We have a “Square Root” of the following numbers we enter in the code.

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Example 02:

When we use a number not supported by a mathematical task, we will have a Python ValueError occur that is a math domain error. The ValueError shows that you are requesting to perform a mathematical operation on a value that does not accept that operation.

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As we can see, a ValueError occurs when a math domain error is generated.

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Example 03:

The input function used in this example is to get input from the user by entering a value. The used number’s square root is computed using the square root function, which changes the entered number to float.

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As we can see, when we enter a value as input, we will get a float value as output.

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When we do not give any number input in console time, the error message displays “Number must be entered.”

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Example 04:

We will use the built-in numpy square root function to find the square root in this manner. The numpy module’s np.sqrt() method is stated in Python. The np.sqrt() method returns a numpy array with each member representing the square root of the numpy array supplied as an argument. Have a look at how to use Python’s built-in np.sqrt() method in a program.

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After the execution of this code, the solution is given below.

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Note: If the numpy array contains a negative number, the built-in np.sqrt() method will produce a Runtime warning, indicating that an invalid value was encountered in sqrt. Substitute the square root of the negative value with a nan value in the numpy array returned.

Example 05:

We will use the built-in power function to calculate square root in this method. In Python, the power function is specified in the math module. The square root of the number (base) supplied as the first argument is returned by the math.pow() function accepts two arguments: base and exponent/power. The exponent/power argument is set to 2.5 to calculate the square root. Let’s look at how to use Python’s built-in pow() function in a program.

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After the execution of this code, the solution is given below.

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Example 06:

The cmath package in Python is utilized to compute the square root of a Real or Complex value. The different strategies we’ve used so far will operate fine for any positive Real numbers. The cmath module, on the other hand, is helpful for negative or complex numbers.

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After the execution of this code, the solution given is as below.

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Conclusion:

Cheers! We have learned everything about Python’s square root function. You studied several different ways to compute the square root of values in Python on this topic. While computing sqrt, you looked at the range of permissible numbers, investigated the various error signals, and devised a few different methods for dealing with minus squares and obtaining complex solutions. Using the sqrt() function, the exponent operator, the pow() function, and the cmath module, we learned how to calculate the square root of a number in Python. Additional libraries, such as numpy, a Python array library, can use the sqrt() function in addition to the math package.

About the author

Kalsoom Bibi

Hello, I am a freelance writer and usually write for Linux and other technology related content