{"id":226271,"date":"2025-06-05T04:43:38","date_gmt":"2025-06-05T04:43:38","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=226271"},"modified":"2025-06-05T04:43:40","modified_gmt":"2025-06-05T04:43:40","slug":"product-of-list-write-a-program-that-outputs-the-product-the-result-of-multiplying-together-all-of-the-elements-in-an-array-create-an-array-textttarr-with-the-values-1-8-3-4-2-9-the-ans","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/05\/product-of-list-write-a-program-that-outputs-the-product-the-result-of-multiplying-together-all-of-the-elements-in-an-array-create-an-array-textttarr-with-the-values-1-8-3-4-2-9-the-ans\/","title":{"rendered":"Product of List Write a program that outputs the product (the result of multiplying together) all of the elements in an array. Create an array \\texttt{arr} with the values [1, 8, 3, 4, 2, 9]. The answer should be 1728."},"content":{"rendered":"\n

Product of List Write a program that outputs the product (the result of multiplying together) all of the elements in an array. Create an array \\texttt{arr} with the values [1, 8, 3, 4, 2, 9]. The answer should be 1728.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

To solve Exercise 7.4.7: Product of List<\/strong>, you need to calculate the product (multiplication result) of all elements in a given list.<\/p>\n\n\n\n

\u2705 Correct Code (Python):<\/h3>\n\n\n\n
arr = [1, 8, 3, 4, 2, 9]\nproduct = 1\n\nfor num in arr:\n    product *= num\n\nprint(product)\n<\/code><\/pre>\n\n\n\n
\ud83d\udca1 Output:<\/h3>\n\n\n\n
1728\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udd0d Explanation<\/h3>\n\n\n\n
This exercise asks us to compute the product of all elements<\/strong> in a list, which means multiplying all the numbers together to get a single result. The list provided is:<\/p>\n\n\n\n
arr = [1, 8, 3, 4, 2, 9]\n<\/code><\/pre>\n\n\n\n
The product is calculated as:<\/p>\n\n\n\n
1 * 8 * 3 * 4 * 2 * 9 = 1728\n<\/code><\/pre>\n\n\n\n
We initialize a variable product<\/code> with the value 1<\/code> because 1 is the identity for multiplication \u2014 multiplying by 1 keeps the number the same. We then use a for<\/code> loop to go through each element in the list and multiply it with the running total in product<\/code>.<\/p>\n\n\n\n
Let\u2019s break it down step-by-step:<\/p>\n\n\n\n
    \n
  1. Start with product = 1<\/code><\/li>\n\n\n\n
  2. Multiply by 8 \u2192 product = 1 * 8 = 8<\/code><\/li>\n\n\n\n
  3. Multiply by 3 \u2192 product = 8 * 3 = 24<\/code><\/li>\n\n\n\n
  4. Multiply by 4 \u2192 product = 24 * 4 = 96<\/code><\/li>\n\n\n\n
  5. Multiply by 2 \u2192 product = 96 * 2 = 192<\/code><\/li>\n\n\n\n
  6. Multiply by 9 \u2192 product = 192 * 9 = 1728<\/code><\/li>\n<\/ol>\n\n\n\n
    This approach is efficient and works for any list of numbers. It’s a common beginner exercise in Python because it teaches important programming concepts:<\/p>\n\n\n\n
      \n
    • Looping through a list<\/li>\n\n\n\n
    • Maintaining a running total<\/li>\n\n\n\n
    • Understanding identity values (1 for multiplication, 0 for addition)<\/li>\n<\/ul>\n\n\n\n
      The final output 1728<\/code> is printed using print(product)<\/code>.<\/p>\n\n\n\n
      This method is applicable to real-world tasks such as calculating compound interest, scaling values, or working with mathematical models involving products of numbers.<\/p>\n\n\n\n
      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
      Product of List Write a program that outputs the product (the result of multiplying together) all of the elements in an array. Create an array \\texttt{arr} with the values [1, 8, 3, 4, 2, 9]. The answer should be 1728. The Correct Answer and Explanation is: To solve Exercise 7.4.7: Product of List, you need […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-226271","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=226271"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/226271\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=226271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=226271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=226271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}