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The Python math.exp2() method is used to calculate 2 raised to the power of a given number i.e 2^x. It calculates the exponential method with base 2. Mathematically, the method is represented as −

exp2(x) = 2x

For example, if x = 3, then the exponential method exp2(3) evaluates to 2³, which is equal to 8. In other words, when you multiply 2 by itself three times, the product is 8.

Syntax

Following is the basic syntax of the Python math.exp2() method −

math.exp2(x)

Parameters

This method accepts a real number, either an integer or a floating-point number as a parameter, representing the exponent to which 2 will be raised.

Return Value

The method returns the value of 2 raised to the power of x. The return value is a floating-point number.

Example 1

In the following example, we calculate 2 raised to the power of 3, i.e. passing a positive integer exponent to the base 2 as a parameter −

import math
result = math.exp2(3)
print("The result obtained is:", result)  

Output

The output obtained is as follows −

The result obtained is: 8.0

Example 2

Here, we pass a negative integer exponent to the base 2 as a parameter. We calculate 2 raised to the power of -2, which is equivalent to 1 divided by 2 squared −

import math
result = math.exp2(-2)
print("The result obtained is:", result)  

Output

Following is the output of the above code −

The result obtained is: 0.25

Example 3

In this example, we are passing a fractional exponent as a parameter to the base 2. We are calculating 2 raised to the power of 1.5 −

import math
result = math.exp2(1.5)
print("The result obtained is:", result) 

Output

We get the output as shown below −

The result obtained is: 2.8284271247461903

Example 4

Now, we use a variable "x" to store the exponent value. We then calculate 2 raised to the power of "x", which is 2², resulting in 4 −

import math
x = 2
result = math.exp2(x)
print("The result obtained is:", result)  

Output

The result produced is as shown below −

The result obtained is: 4.0

python_maths.htm