{"id":6189,"date":"2021-08-20T19:54:02","date_gmt":"2021-08-20T14:24:02","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=6189"},"modified":"2021-08-20T19:55:06","modified_gmt":"2021-08-20T14:25:06","slug":"three-sum-closest-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/three-sum-closest-golang\/","title":{"rendered":"Find the sum  which is closest to a target number using three numbers in an array or 3Sum closest problem in Go (Golang)"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/golangbyexamples.com\/three-sum-closest-golang\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/three-sum-closest-golang\/#Program\" title=\"Program\">Program<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"has-luminous-vivid-orange-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">The objective is to find the sum using three triplets in the given array such that the sum is closest to a given target sum.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">For<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Input Array: [0,2,3,-1] Target Sum:6\nOutput: 5 . It can be formed using 0+2+3 <\/code><\/pre>\n\n\n\n<h2 class=\"has-luminous-vivid-orange-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Program\"><\/span><strong>Program<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">Below is the program for the same<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\t\"math\"\n\t\"sort\"\n)\n\nfunc main() {\n\toutput := threeSumClosest([]int{0, 2, 3, -1}, 6)\n\tfmt.Println(output)\n}\n\nfunc threeSumClosest(nums []int, target int) int {\n\n\tnumsLength := len(nums)\n\n\tclosestSum := 0\n\tnearest := 10000\n\n\tsort.Slice(nums, func(i, j int) bool {\n\t\treturn nums[i] < nums[j]\n\t})\n\n\tfor k := 0; k < numsLength-2; k++ {\n\t\ti := k + 1\n\t\tj := numsLength - 1\n\t\tfor i < j {\n\t\t\tsum := nums[k] + nums[i] + nums[j]\n\t\t\tabsSum := int(math.Abs(float64(target - sum)))\n\n\t\t\tif absSum < nearest {\n\t\t\t\tnearest = absSum\n\t\t\t\tclosestSum = sum\n\t\t\t}\n\n\t\t\tif nums[k]+nums[i]+nums[j] > target {\n\t\t\t\tj--\n\t\t\t} else {\n\t\t\t\ti++\n\t\t\t}\n\t\t}\n\t}\n\n\treturn closestSum\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">5<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Note: <\/strong>Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all concepts with examples. This tutorial is for those who are looking to gain expertise and a solid understanding of golang &#8211; <a href=\"https:\/\/golangbyexamples.com\/golang-comprehensive-tutorial\/\">Golang Advance Tutorial<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also if you are interested in understanding how all design patterns can be implemented in Golang. If yes, then this post is for you &#8211;<a href=\"https:\/\/golangbyexamples.com\/all-design-patterns-golang\/\">All Design Patterns Golang<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview The objective is to find the sum using three triplets in the given array such that the sum is closest to a given target sum. For Program&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3,4],"class_list":["post-6189","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Find the sum which is closest to a target number using three numbers in an array or 3Sum closest problem in Go (Golang) - Welcome To Golang By Example<\/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:\/\/golangbyexamples.com\/three-sum-closest-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Find the sum which is closest to a target number using three numbers in an array or 3Sum closest problem in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"Table of Contents OverviewProgram Overview The objective is to find the sum using three triplets in the given array such that the sum is closest to a given target sum. 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