{"id":28974,"date":"2024-01-05T18:59:02","date_gmt":"2024-01-05T13:29:02","guid":{"rendered":"https:\/\/btechgeeks.com\/?p=28974"},"modified":"2024-01-06T17:00:41","modified_gmt":"2024-01-06T11:30:41","slug":"java-program-to-find-the-sum-of-series-1-12-123-1234n","status":"publish","type":"post","link":"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-12-123-1234n\/","title":{"rendered":"Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026  + (1+2+3+4\u2026+N)"},"content":{"rendered":"<p>In the previous article we have discussed about <a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-12-123-1234n-2\/\">Java Program to Find the Sum of Series 1 + (1*2) + (1*2*3) + \u2026 + (1*2*3*4\u2026*N)<\/a><\/p>\n<p>In this article we are going to see how to print the sum of the series 1 + (1+2) + (1+2+3) + &#8230; + (1+2+3+4\u2026+n) by using Java programming language.<\/p>\n<h2><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N)&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:771,&quot;3&quot;:{&quot;1&quot;:0},&quot;4&quot;:{&quot;1&quot;:2,&quot;2&quot;:65535},&quot;11&quot;:4,&quot;12&quot;:0}\">Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N)<\/span><\/h2>\n<p>On observing the pattern carefully, we can see<\/p>\n<p>1<sup>st<\/sup> term = 1 (fixed)<\/p>\n<p>Nth term = sum of n terms starting from 1<\/p>\n<p><strong>Example:<\/strong><\/p>\n<pre>Suppose value of n = 3\r\n\r\n1 + (1+2) + (1+2+3) = 1 + 3 + 6 = 10<\/pre>\n<h3>Method-1: Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N) By Using For Loop<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare an integer variable say \u2018<code>n<\/code>\u2019 and assign the value to it, which holds the value of Nth term.<\/li>\n<li>Create Scanner class object.<\/li>\n<li>Prompt the user to enter a number as value of <code>n<\/code>.<\/li>\n<li>Declare an long variable say &#8216;<code>sum<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Use a for loop <code>from i=1 to i&lt;=n<\/code> (incremented by 1)<\/li>\n<li>Declare an long variable say &#8216;<code>term<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Inside the for loop, we will find the value of <code>term+=i<\/code>, and then add the value of term with sum for every iteration.<\/li>\n<li>Print the result.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">import java.util.*;\r\npublic class Main\r\n{\r\n    public static void main(String [] args)\r\n    {\r\n        \/\/creating object of Scanner class \r\n        Scanner s = new Scanner(System.in);\r\n        \/\/Taking input of number of elements in the series\r\n        System.out.println(\"Enter the value of 'n' \");\r\n        int n = s.nextInt();\r\n        \/\/for loop to print the series\r\n        long sum = 0, term = 0;\r\n        for (int i = 1; i &lt;= n; i++) \r\n        {\r\n            term += i;\r\n            sum += term;\r\n        }\r\n        System.out.println(\"Sum of the series is \" + sum);\r\n    }\r\n}\r\n<\/pre>\n<pre>Output:\r\n\r\nEnter the value of 'n' \r\n3\r\nSum of the series is 10<\/pre>\n<h3>Method-2: Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N) By Using While Loop<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare an integer variable say \u2018<code>n<\/code>\u2019 and assign the value to it, which holds the value of Nth term.<\/li>\n<li>Create Scanner class object.<\/li>\n<li>Prompt the user to enter a number as value of <code>n<\/code>.<\/li>\n<li>Declare an long variable say &#8216;<code>sum<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Use a while loop <code>from i=1 to i&lt;=n<\/code> (incremented by 1)<\/li>\n<li>Declare an long variable say &#8216;<code>term<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Inside while loop, we will find the value of <code>term+=i<\/code>, and then add the value of term with sum for every iteration.<\/li>\n<li>Print the result.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">import java.util.*;\r\npublic class Main\r\n{\r\n    public static void main(String [] args)\r\n    {\r\n        \/\/creating object of Scanner class \r\n        Scanner s = new Scanner(System.in);\r\n        \/\/Taking input of number of elements in the series\r\n        System.out.println(\"Enter the value of 'n' \");\r\n        int n = s.nextInt();\r\n        \/\/ while loop to print the series\r\n       long sum = 0,term = 0;\r\n       int i = 1;\r\n       while(i &lt;= n)\r\n       {  \r\n            term += i;\r\n            sum += term;\r\n            i++;\r\n       }\r\n       System.out.println(\"Sum of the series is \" + sum);\r\n   }\r\n}\r\n<\/pre>\n<pre>Output:\r\n\r\nEnter the value of 'n' \r\n3\r\nSum of the series is 10<\/pre>\n<h3>Method-3: Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N) By Using User Defined Method<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare an integer variable say \u2018<code>n<\/code>\u2019 and assign the value to it, which holds the value of Nth term.<\/li>\n<li>Create Scanner class object.<\/li>\n<li>Prompt the user to enter a number as value of <code>n<\/code>.<\/li>\n<li>Call a user defined method say <code>printSeries()<\/code> by passing <code>n<\/code> as parameter.<\/li>\n<li>Inside method declare an long variable say &#8216;<code>sum<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Use a for loop <code>from i=1 to i&lt;=n<\/code> (incremented by 1)<\/li>\n<li>Declare an long variable say &#8216;<code>term<\/code>&#8216; and initialize it to 0.<\/li>\n<li>Inside the for loop, we will find the value of <code>term+=i<\/code>, and then add the value of term with sum for every iteration.<\/li>\n<li>Print the result.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">import java.util.*;\r\npublic class Main\r\n{\r\n    public static void main(String[] args)\r\n   {\r\n        \/\/ creating object of scanner class \r\n        Scanner s = new Scanner(System.in);\r\n        \/\/Taking input of number of elements in the series\r\n        System.out.println(\"Enter the value of 'n' \");\r\n        int n = s.nextInt();\r\n       \/\/ calling printSeries() method to print the series\r\n        printSeries(n);\r\n   }\r\n    public static void printSeries(int n)\r\n    {\r\n        \/\/for loop to print the series\r\n        long sum = 0, term = 0;\r\n        for (int i = 1; i &lt;= n; i++) \r\n        {\r\n            term += i;\r\n            sum += term;\r\n        }\r\n        System.out.println(\"Sum of the series is \" + sum);\r\n    }\r\n}\r\n\r\n<\/pre>\n<pre>Output:\r\n\r\nEnter the value of 'n' \r\n4\r\nSum of the series is 20<\/pre>\n<p>If you are new to Java and want to learn the java coding skills too fast. Try practicing the core java programs with the help of the<a href=\"https:\/\/btechgeeks.com\/java-programming-examples\/\"> Java basic programs list<\/a> available.<\/p>\n<p><strong>Related Java Programs:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-print-the-series-24-99-224-399-624-899-n\/\">Java Program to Print the Series 24 99 224 399 624 899 \u2026N<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-1-2-1-3-1-n\/\">Java Program to Find the Sum of Series 1 + (1\/2) + (1\/3) + \u2026 + N<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-1-3-1-5-n\/\">Java Program to Find the Sum of Series 1 + (1\/3) + (1\/5) + \u2026 + N<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-2-2-3-3-4-n\/\">Java Program to Find the Sum of Series (1\/2) + (2\/3) + (3\/4) + \u2026\u2026 + N<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In the previous article we have discussed about Java Program to Find the Sum of Series 1 + (1*2) + (1*2*3) + \u2026 + (1*2*3*4\u2026*N) In this article we are going to see how to print the sum of the series 1 + (1+2) + (1+2+3) + &#8230; + (1+2+3+4\u2026+n) by using Java programming language. &#8230; <a title=\"Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026  + (1+2+3+4\u2026+N)\" class=\"read-more\" href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-sum-of-series-1-12-123-1234n\/\" aria-label=\"More on Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026  + (1+2+3+4\u2026+N)\">Read more<\/a><\/p>\n","protected":false},"author":9,"featured_media":30707,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[15],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N) - 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\/java-program-to-find-the-sum-of-series-1-12-123-1234n\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java Program to Find the Sum of Series 1 + (1+2) + (1+2+3) + \u2026 + (1+2+3+4\u2026+N) - BTech Geeks\" \/>\n<meta property=\"og:description\" content=\"In the previous article we have discussed about Java Program to Find the Sum of Series 1 + (1*2) + (1*2*3) + \u2026 + (1*2*3*4\u2026*N) In this article we are going to see how to print the sum of the series 1 + (1+2) + (1+2+3) + &#8230; + (1+2+3+4\u2026+n) by using Java programming language. ... 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