{"id":18202,"date":"2022-09-07T10:30:14","date_gmt":"2022-09-07T05:00:14","guid":{"rendered":"https:\/\/btechgeeks.com\/?p=18202"},"modified":"2022-09-07T10:59:30","modified_gmt":"2022-09-07T05:29:30","slug":"python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next","status":"publish","type":"post","link":"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/","title":{"rendered":"List multiplication python &#8211; Python Program to Replace Every List Element by Multiplication of Previous and Next"},"content":{"rendered":"<p><strong>List multiplication python: <\/strong>In the previous article, we have discussed <a href=\"https:\/\/btechgeeks.com\/python-program-for-double-factorial\/\">Python Program for Double Factorial<\/a><br \/>\nGiven a list and the task is to replace each element of a list by multiplying the previous and next elements.<\/p>\n<p>The first element is replaced by multiplying the first and second elements.<\/p>\n<p>The last element is replaced by multiplying the last and second last elements.<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Example1:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given list = [7, 8, 1, 2, 3, 4]<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given List after replacing each element of a list by multiplying the previous and next elements:\r\n56 7 16 3 8 12<\/pre>\n<p><strong>Explanation:<\/strong><\/p>\n<pre>Given List = [7*8, 7*1, 8*2, 1*3, 2*4, 3*4]<\/pre>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-multiply-each-element-of-a-list-by-a-number\/\">Python Program to Multiply Each Element of a List by a Number | How to Multiply Each Element in a List by a Number in Python?<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-for-efficient-way-to-multiply-with-7\/\">Python Program for Efficient Way to Multiply With 7<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-for-multiplication-of-two-matrices\/\">Python Program for Multiplication of Two Matrices | How do you do Matrix Multiplication in Python?<\/a><\/li>\n<\/ul>\n<p><strong>Example2:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given list =[ 10 ,1 ,20, 2 ,30, 3]<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>The given List after replacing each element of a list by multiplying the previous and next elements:\r\n10 200 2 600 6 90<\/pre>\n<p><strong>Explanation:<\/strong><\/p>\n<pre>Given List = [10*1, 10*20, 1*2, 20*30, 2*3, 30*3] = [10, 200, 2, 600, 6, 90]<\/pre>\n<h2>Program to Replace Every List Element by Multiplication of Previous and Next in Python<\/h2>\n<p><strong>Python list multiplication: <\/strong>Below are the ways to replace each element of a list by multiplying the previous and next elements.<\/p>\n<ul>\n<li><a href=\"#Using_For_Loop_(Static_Input)\">Using For Loop (Static Input)<\/a><\/li>\n<li><a href=\"#Using_For_loop_(User_Input)\">Using For loop (User Input)<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_For_Loop_(Static_Input)\">Method #1: Using For Loop (Static Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Give the list as static input and store it in a variable.<\/li>\n<li>Calculate the length of the list using the len() function and store it in another variable.<\/li>\n<li>Check if the length of the given list is less than or equal to 1 using the if conditional statement.<\/li>\n<li>If the statement is true, do not print anything.<\/li>\n<li>Take a variable and initialize it with the first element of the given list say &#8220;previous&#8221;.<\/li>\n<li>Multiply the first and the next element of a list and store it in another variable.<\/li>\n<li>Loop from 1 to length of the given list -1 using the for loop.<\/li>\n<li>Inside the loop, assign the iterator value of the given list and store it in a<br \/>\nvariable say &#8220;currnt&#8221;.<\/li>\n<li>Multiply the above obtained &#8220;previous&#8221; with a given list of iterator+1 value<br \/>\nand store it in the given list of the iterator.<\/li>\n<li>Assign the variable &#8220;currnt&#8221; to the &#8220;previus&#8221; and come out of the loop.<\/li>\n<li>Multiply the above obtained &#8220;previous&#8221; with a given list of length-1 values and store it in the given list of length-1.<\/li>\n<li>print the given list after replacing each element of a list by multiplying the previous and next elements.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Give the list as static input and store it in a variable.\r\ngvn_lst = [7, 8, 1, 2, 3, 4]\r\n# Calculate the length of the list using the len() function and\r\n# store it in another variable.\r\nlenth = len(gvn_lst)\r\n# Check if the length of the given list is less than or equal to 1 using the\r\n# if conditional statement.\r\nif lenth &lt;= 1:\r\n  # If the statement is true, do not print anything.\r\n    print()\r\n # Take a variable and initialize it with the first element of the given list\r\n# say \"previous\".\r\nprevius = gvn_lst[0]\r\n# Multiply the first and the next element of a list and store it in another variable.\r\ngvn_lst[0] = gvn_lst[0] * gvn_lst[1]\r\n# Loop from 1 to length of the given list -1 using the for loop.\r\nfor itr in range(1, lenth-1):\r\n  # Inside the loop, assign the iterator value of the given list and store it in a\r\n  # variable say \"currnt\"\r\n    currnt = gvn_lst[itr]\r\n# Multiply the above obtained \"previous\" with given list of iterator+1 value\r\n# and store it in given list of iterator.\r\n    gvn_lst[itr] = previus * gvn_lst[itr+1]\r\n # Assign the variable \"currnt\" to the \"previus\" and come out of the loop.\r\n    previus = currnt\r\n# Multiply the above obtained \"previous\" with given list of length-1 value\r\n# and store it in given list of length-1.\r\ngvn_lst[lenth-1] = previus * gvn_lst[lenth-1]\r\n# print the given list after replacing each element of a list by\r\n# multiplying the previous and next elements\r\nprint(\"The given List after replacing each element of a list by multiplying the previous and next elements:\")\r\nfor itr in range(0, lenth):\r\n    print(gvn_lst[itr], end=\" \")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given List after replacing each element of a list by multiplying the previous and next elements:\r\n56 7 16 3 8 12<\/pre>\n<h3 id=\"Using_For_loop_(User_Input)\">Method #2: Using For loop (User Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Give the list as user input using list(),map(),input(),and split() functions.<\/li>\n<li>Store it in a variable.<\/li>\n<li>Calculate the length of the list using the len() function and store it in another variable.<\/li>\n<li>Check if the length of the given list is less than or equal to 1 using the if conditional statement.<\/li>\n<li>If the statement is true, do not print anything.<\/li>\n<li>Take a variable and initialize it with the first element of the given list say &#8220;previous&#8221;.<\/li>\n<li>Multiply the first and the next element of a list and store it in another variable.<\/li>\n<li>Loop from 1 to length of the given list -1 using the for loop.<\/li>\n<li>Inside the loop, assign the iterator value of the given list and store it in a<br \/>\nvariable say &#8220;currnt&#8221;.<\/li>\n<li>Multiply the above obtained &#8220;previous&#8221; with a given list of iterator+1 value<br \/>\nand store it in the given list of the iterator.<\/li>\n<li>Assign the variable &#8220;currnt&#8221; to the &#8220;previus&#8221; and come out of the loop.<\/li>\n<li>Multiply the above obtained &#8220;previous&#8221; with a given list of length-1 values and store it in the given list of length-1.<\/li>\n<li>print the given list after replacing each element of a list by multiplying the previous and next elements.<\/li>\n<li>The Exit of the Program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Give the list as user input using list(),map(),input(),and split() functions.\r\n#Store it in a variable.\r\ngvn_lst = list(map(int, input(\r\n   'Enter some random List Elements separated by spaces = ').split()))\r\n# Calculate the length of the list using the len() function and\r\n# store it in another variable.\r\nlenth = len(gvn_lst)\r\n# Check if the length of the given list is less than or equal to 1 using the\r\n# if conditional statement.\r\nif lenth &lt;= 1:\r\n  # If the statement is true, do not print anything.\r\n    print()\r\n # Take a variable and initialize it with the first element of the given list\r\n# say \"previous\".\r\nprevius = gvn_lst[0]\r\n# Multiply the first and the next element of a list and store it in another variable.\r\ngvn_lst[0] = gvn_lst[0] * gvn_lst[1]\r\n# Loop from 1 to length of the given list -1 using the for loop.\r\nfor itr in range(1, lenth-1):\r\n  # Inside the loop, assign the iterator value of the given list and store it in a\r\n  # variable say \"currnt\"\r\n    currnt = gvn_lst[itr]\r\n# Multiply the above obtained \"previous\" with given list of iterator+1 value\r\n# and store it in given list of iterator.\r\n    gvn_lst[itr] = previus * gvn_lst[itr+1]\r\n # Assign the variable \"currnt\" to the \"previus\" and come out of the loop.\r\n    previus = currnt\r\n# Multiply the above obtained \"previous\" with given list of length-1 value\r\n# and store it in given list of length-1.\r\ngvn_lst[lenth-1] = previus * gvn_lst[lenth-1]\r\n# print the given list after replacing each element of a list by\r\n# multiplying the previous and next elements\r\nprint(\"The given List after replacing each element of a list by multiplying the previous and next elements:\")\r\nfor itr in range(0, lenth):\r\n    print(gvn_lst[itr], end=\" \")\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>Enter some random List Elements separated by spaces = 10 1 20 2 30 3\r\nThe given List after replacing each element of a list by multiplying the previous and next elements:\r\n10 200 2 600 6 90<\/pre>\n<p>Explore more instances related to python concepts from\u00a0<a href=\"https:\/\/btechgeeks.com\/python-programming-examples-with-output\/\">Python Programming Examples<\/a>\u00a0Guide and get promoted from beginner to professional programmer level in Python Programming Language.<\/p>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-for-product-of-maximum-in-first-array-and-minimum-in-second\/\">Python Program for Product of Maximum in First array and Minimum in Second<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-for-maximum-distance-between-two-occurrences-of-same-element-in-array-list\/\">Python Program for Maximum Distance between Two Occurrences of Same Element in Array\/List<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-leaders-in-an-array-list\/\">Python Program to Find Leaders in an Array\/List<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-two-odd-occurring-elements-in-an-array-list\/\">Python Program to Find Two Odd Occurring Elements in an Array\/List<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>List multiplication python: In the previous article, we have discussed Python Program for Double Factorial Given a list and the task is to replace each element of a list by multiplying the previous and next elements. The first element is replaced by multiplying the first and second elements. The last element is replaced by multiplying &#8230; <a title=\"List multiplication python &#8211; Python Program to Replace Every List Element by Multiplication of Previous and Next\" class=\"read-more\" href=\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/\" aria-label=\"More on List multiplication python &#8211; Python Program to Replace Every List Element by Multiplication of Previous and Next\">Read more<\/a><\/p>\n","protected":false},"author":7,"featured_media":18838,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>List multiplication python - Python Program to Replace Every List Element by Multiplication of Previous and Next - BTech Geeks<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"List multiplication python - Python Program to Replace Every List Element by Multiplication of Previous and Next - BTech Geeks\" \/>\n<meta property=\"og:description\" content=\"List multiplication python: In the previous article, we have discussed Python Program for Double Factorial Given a list and the task is to replace each element of a list by multiplying the previous and next elements. 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Python Program to Replace Every List Element by Multiplication of Previous and Next\"}]},{\"@type\":\"Article\",\"@id\":\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/#webpage\"},\"author\":{\"@id\":\"https:\/\/btechgeeks.com\/#\/schema\/person\/fb109fd98e2d5a15fd4dac9970797602\"},\"headline\":\"List multiplication python &#8211; Python Program to Replace Every List Element by Multiplication of Previous and Next\",\"datePublished\":\"2022-09-07T05:00:14+00:00\",\"dateModified\":\"2022-09-07T05:29:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/#webpage\"},\"wordCount\":681,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/btechgeeks.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/btechgeeks.com\/wp-content\/uploads\/2021\/08\/Program-to-Replace-Every-List-Element-by-Multiplication-of-Previous-and-Next.png\",\"articleSection\":[\"Python\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/#respond\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/btechgeeks.com\/#\/schema\/person\/fb109fd98e2d5a15fd4dac9970797602\",\"name\":\"Vikram Chiluka\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/btechgeeks.com\/#personlogo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c56c77f578d45de43af6feb443618ed7?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c56c77f578d45de43af6feb443618ed7?s=96&d=mm&r=g\",\"caption\":\"Vikram Chiluka\"},\"sameAs\":[\"https:\/\/www.showwcase.com\/vikkycirus\",\"https:\/\/www.linkedin.com\/in\/vikram-chiluka-82587a198\/\"],\"url\":\"https:\/\/btechgeeks.com\/author\/vikram\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"List multiplication python - Python Program to Replace Every List Element by Multiplication of Previous and Next - BTech Geeks","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/btechgeeks.com\/python-program-to-replace-every-list-element-by-multiplication-of-previous-and-next\/","og_locale":"en_US","og_type":"article","og_title":"List multiplication python - Python Program to Replace Every List Element by Multiplication of Previous and Next - BTech Geeks","og_description":"List multiplication python: In the previous article, we have discussed Python Program for Double Factorial Given a list and the task is to replace each element of a list by multiplying the previous and next elements. 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