Calculate exponential value of a number in Python [5 Methods]

In this Python tutorial, we will discuss how to calculate exponential value of a number in Python. Moreover, we’ll look at various methods present with examples to calculate exponential value of a number in Python.

Recently, I have been working on a machine learning project and found that it requires the exponential value of a number. So, I have researched and found that we have many ways to calculate exponential value of a number in Python.

Methods to calculate exponential value of a number in Python

There are many different methods to calculate exponential value of a number in Python :

  1. for loop
  2. The ** operator
  3. pow() function
  4. math.pow() method
  5. math.exp() method

Let’s see them all, one by one with some illustrative examples:

Method 1: Calculate exponential in Python using for loop

One of the initial approaches to calculate exponential value of a number in Python is to utilize loops in Python. The for loops allow us to repeatedly execute a code block in Python, which is particularly beneficial for tasks like calculating exponential values.

Example: Consider a situation where we have to create a Python program that can calculate exponential value of a number without using any specific function present in Python and also take the values from the user.

base = int(input('Enter the base value: '))
exponent = int(input('Enter the exponent value: '))

result = 1

if exponent != 0:
    for i in range(exponent):
        result = result * base
else:
    result = result
print(f"The value of {base} to the power {exponent} is: ", result)

Output: Here, In this case, we have initialized a Python variable to 1. This will be used to store the final result of the base raised to the power of the exponent.

If the exponent value is not 0, a for loop is initiated in Python, running from 0 to exponent – 1. The variable i takes on each of these values in turn. The result is multiplied by the base for each iteration. Effectively, this multiplies base by itself exponent times.

If the exponent is 0, the else block executes, but it doesn’t actually change anything.

Enter the base value: 7
Enter the exponent value: 3
The value of 7 to the power 3 is:  343
exponential in python

This way we can use conditional statements with a for loop to calculate the exponential value of a number in Python.

Method 2: Calculate the exponential value of a number in Python using the ** operator

The ** operator is a simple and direct way to calculate the power of a number in Python. We can use it to raise any number (base) to the power of any other number (exponent). This operator is versatile and can handle integers, floating-point numbers, and even complex numbers.

Example: Here we will take an example and check how to calculate the exponential value of a number using the ** operator.

new_base = 8
new_exp = 3
print ("Exponential Value is: ", new_base ** new_exp)

Output: Here is the implementation of the following given Python code.

Exponential Value is:  512
python exponential value

Method 3: Calculate the exponential value of a number in Python using the pow() function

  • Python provides a built-in pow() function that users can use to calculate the exponential value in addition to the ** operator.
  • After accepting the base and exponent as inputs, the function returns the equivalent value.
  • One of the built-in functions, pow(), accepts two to three arguments. When two parameters are supplied, it assists in determining the exponential value; if a third argument is passed, the exponential value’s modulus is then determined.

Example: Let’s take an example and check how to calculate exponential value of a number using the pow() function in Python.

Source Code:

new_base = 16
new_exponent = 4

# using pow() function
result= pow(new_base, new_exponent)
print("Exponential value is :",result )

Output: In the following given code first, we declared two variables. Next, we used the pow() function to get the exponential value of input numbers in Python.

Exponential value is : 65536

Here is the implementation of the following given Python code:

exponential of a number in python

Method 4: Calculate the exponential Python using math.pow() function

  • In this section, we will discuss how to calculate the exponential value of a number using the math.pow() function.
  • The value of x raised to the power of y is returned by the math.pow(x, y) function, which requires two inputs. It raises a ValueError if x is negative and y is not an integer.
  • Both parameters are converted into floats using math.pow() function, which then outputs the float datatype.

Example:

import math

new_output= math.pow(7, 2)
print(new_output)

Output: In the above code first, we imported the math library and then used the math.pow() function and within this function, we passed the exponential and power values.

Exponential value is: 49.0

You can refer to the below Screenshot:

exponential value in python

Method 5: Calculate exponential value in Python using math.exp() function

  • In this section, we will discuss how to calculate exponential value of a number in Python using exp() function from the math library.
  • Python’s built-in exp() function can be used to determine any number’s power of e value. signifies e^n, where n is the supplied number. 2.71828 is approximately equal to the value of e. The exp() function is part of the math library, so before using it, we must import the math library.
  • The math.exp(x) function, where e is the base of the natural logarithm, returns the value of e raised to the power of x.

Syntax:

Let’s have a look at the Syntax and understand the working of math.exp(x) in Python

math.exp(x)

Example: Here we will take an example and check how to calculate exponential value of a number in Python using math.exp() function.

Source Code:

import math

new_val = 7
new_output = math.exp(new_val)
# Display the Content
print('Exponent of value :', new_output)

Output:

Exponent of value : 1096.6331584284585

Here is the Screenshot of the following given Python code:

Calculate exponential value of a number in Python

Conclusion

In this article, we have discussed how to calculate exponential value of a number in Python. What are the different methods such as for loop, the ** operator, pow() function, and math library functions like pow() and exp() to calculate the exponential value of a number in Python? Also, I have explained each of the methods with the help of some examples in Python.

You may also like to read the following Python tutorials.