Find product of elements in Python using indexed list

Introduction

List is a data type in Python, used to store multiple numbers and strings in a single variable. We can access the elements of the list with the help of index. In Python, each element has an index value. It starts at 0, the second element is 1, and the third element is 2. . For example, we have a list [2, 4, 6, 8] which contains 4 elements. We can use indexes to perform operations on specific elements of a list.

Understanding Questions

Now it’s time to understand the given questions in sequence. We will understand the given problem with the help of the following examples. Suppose we have a list of numbers [1,2,3,4,5]. We have to find the product of specific elements based on their position in the list. Let's create another list and name it index list. We will write the index of the number we want to multiply. Assume that the index of the above list is [0,2,4]. We can say we want to multiply the elements at positions 0, 2 and 4. In the above question, the values ​​at indexes 0,2 and 4 are 1,3 and 5. So the product of these values ​​will be 1*3*5 which is equal to 15. This paragraph gives you an accurate understanding of using an indexed list to find the product of elements. In the next paragraph, we will see the process of how to solve this problem with the help of Python language.

Use Python to solve problems

This is a step-by-step procedure for finding the product of elements using an indexed list. To write a program that finds the product of elements using an indexed list, we must perform the following steps in sequence. All the steps

are mentioned below

Step 1: Define the function

We will start the program by defining a function. This function will contain instructions to help find element-wise products. The name of the function will be "Product_of_elements" and it will contain two parameters. One is a list of indices and the other is a list of elements.

Step 2: Initialize the product

Inside the function, we will initialize a variable named "product" to hold the final result. We set its initial value to 1 as if we multiplied it by 1 it would not affect the initial value.

Step 3: Traverse the index list

In this step, we will iterate through each index in the given index list. We will use a for loop to perform the above traversal. Basically, a for loop helps us iterate through each element in a list without duplicating code.

Step 4: Access the element

Elements can be accessed more easily with the help of indexes. We will use the index of the element in the form of its position. With the help of indexing in python, any operation can be applied easily.

Step 5: Multiply the elements

Now it's time to multiply the current element with the product. We can update the product using the "*=" operator, which multiplies the current element with that element.

Step 6: Repeat the process

Loops in Python help to repeat the same process again and again. The loop will continue until we have visited all indexes in the index list. This will ensure that we have accessed every element in the list and performed an operation on it.

Step 7: Return the product

After accessing each element in the list, we will receive the product of the specified elements. Finally, we will return the final result from the function.

Example

def product_of_elements(index_list, elements_list):
    product = 1
    for index in index_list:
        product *= elements_list[index]
    return product

indices = [0, 2, 4]
elements = [1, 2, 3, 4, 5]
result = product_of_elements(indices, elements)
print("the Product of elements using Index list in Python is ",result)

Output

 the Product of elements using Index list in Python is  15      

Example usage and output

When we run the above code in Visual Studio Code IDE. We will be able to understand how the code works. If we have a list of numbers [1, 2, 3, 4, 5] and the number at index [0, 2, 4] we want to multiply. We will call the function "product_of_elements" by passing the index and element as parameters. Now we store the result in a variable called "result". We will then print the value of "result" to see the calculated product.

When we run the code, the elements at positions 0, 2 and 4 in lists 1, 3, 5 will be multiplied and stored in the result variable. This will store 15 in the result variable.

in conclusion

The previous issue showed us how to use an indexed list in Python to get the product of items. Python is the language that makes this type of problem the easiest to solve. We defined a function in the previous challenge. The result is returned after we iterate over the list, access specific items, multiply them and return them.

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