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Python math.prod() Method

The Python math.prod() method is used to calculate the product of all elements in a given iterable. Mathematically, it is denoted as −

prod(x1, x2, x3, ..., xn) = x1 × x2 × x3 × ... × xn

For example, if we have a list "[2, 3, 4, 5]", the "math.prod([2, 3, 4, 5])" method call will return 2 × 3 × 4 × 5 = 120.

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

math.prod(iterable, *, start=1)

This method accepts the following parameters −

• iterable − It is the iterable (such as a list, tuple, or generator) whose element's product is to be calculated.

• start (optional) − It specifies the starting value for the product. It's default value is 1.

The method returns the product of all the elements in the iterable.

In the following example, we are calculating the product of all elements in the list "[1, 2, 3, 4, 5]" −

import math
numbers = [1, 2, 3, 4, 5]
result = math.prod(numbers)
print("The result obtained is:",result)         

The output obtained is as follows −

The result obtained is: 120

Here, we are using a generator expression to generate numbers from "1" to "5". We then calculate the product of these numbers −

import math
numbers = (i for i in range(1, 6))
result = math.prod(numbers)
print("The result obtained is:",result)  

Following is the output of the above code −

The result obtained is: 120

Now, we are calculating the product of all the fractional elements in the list "[0.5, 0.25, 0.1]" −

import math
numbers = [0.5, 0.25, 0.1]
result = math.prod(numbers)
print("The result obtained is:",result)  

We get the output as shown below −

The result obtained is: 0.0125

In this example, we are calculating the product of an empty list −

import math
result = math.prod([])
print("The result obtained is:",result)  

The result produced is as shown below −

The result obtained is: 1

python_maths.htm

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