{"id":9882,"date":"2022-09-06T09:07:33","date_gmt":"2022-09-06T09:07:33","guid":{"rendered":"https:\/\/prwatech.in\/blog\/?p=9882"},"modified":"2024-04-15T10:39:26","modified_gmt":"2024-04-15T10:39:26","slug":"recursion-in-go-language-different-types-of-recursion-in-golang","status":"publish","type":"post","link":"https:\/\/prwatech.in\/blog\/go-lang\/recursion-in-go-language-different-types-of-recursion-in-golang\/","title":{"rendered":"Recursion in Go Language"},"content":{"rendered":"

Different Types of Recursion in Golang<\/span><\/h2>\n

 <\/p>\n

Recursion in Go (Golang) refers to a programming technique where a function calls itself directly or indirectly to solve a problem. There are different types of recursion that can be applied in Go based on how the recursive calls are made and the structure of the recursive function.<\/p>\n

    \n
  1. Linear Recursion<\/strong>: In linear recursion, a function calls itself exactly once in each recursive call. This type of recursion follows a linear sequence until reaching a base case that terminates the recursion.<\/li>\n
  2. Tail Recursion<\/strong>: Tail recursion occurs when a recursive call is the last operation performed by the function before returning its result. Tail-recursive functions can be optimized by compilers into iterative loops, reducing stack space usage.<\/li>\n
  3. Binary Recursion<\/strong>: Binary recursion involves a function making two recursive calls in each invocation. This type of recursion is common in algorithms dealing with binary trees or divide-and-conquer problems.<\/li>\n
  4. Nested Recursion<\/strong>: Nested recursion occurs when a recursive function calls itself with a recursive call as an argument. This type of recursion can lead to complex patterns of function invocations.<\/li>\n<\/ol>\n
      \n
    1. \n

      Direct Recursion : <\/u><\/strong>Program to illustrate the Fibonacci<\/a> series<\/a><\/h4>\n
      package main\r\nimport \"fmt\"\r\n\r\nfunc fib(i int) int {\r\n\r\n    if i == 0 {\r\n        return 1\r\n    }\r\n    if i == 1 {\r\n        return 1\r\n    }\r\n    return fib(i-1) + fib(i-2)\r\n}\r\nfunc main() {\r\n    var i int\r\n    for i = 0; i < 10; i++ {\r\n        fmt.Printf(\"%d \\n\", fib(i))\r\n\r\n    }\r\n}\r\n<\/pre>\n
      Output :<\/p>\n
      PS C:\\GO_Language\\recursion> go run recursion.go\r\n1 \r\n1 \r\n2 \r\n3 \r\n5 \r\n8 \r\n13 \r\n21 \r\n34 \r\n55\r\n<\/pre>\n
       <\/li>\n
    2. Indirect Recursion:\u00a0 <\/u><\/strong>Program to illustrate indirect recursion between two functions.\n
      package main\r\nimport \"fmt\"\r\n\r\nfunc print_one(n int) {\r\n    if n >= 0 {\r\n        fmt.Println(\"In first function:\", n)\r\n        print_two(n - 1)\r\n    }\r\n}\r\n\r\nfunc print_two(n int) {\r\n\r\n    if n >= 0 {\r\n        fmt.Println(\"In second function:\", n)\r\n        print_one(n - 1)\r\n    }\r\n}\r\n\r\nfunc main() {\r\n    print_one(10)\r\n    print_one(-1)\r\n}\r\n<\/pre>\n
      Output :<\/p>\n
      PS C:\\GO_Language\\recursion> go run indirect_re.go\r\n\r\nIn first function: 10\r\nIn second function: 9\r\nIn first function: 8\r\nIn second function: 7\r\nIn first function: 6\r\nIn second function: 5\r\nIn first function: 4\r\nIn second function: 3\r\nIn first function: 2\r\nIn second function: 1\r\nIn first function: 0\r\n<\/pre>\n
       <\/li>\n
    3. Tail recursion :\u00a0<\/u><\/strong><\/strong> Golang program to illustrate the concept of tail recursion<\/u>\n
      package main\r\n\r\nimport (\r\n    \"fmt\"\r\n)\r\n\r\n\/\/ tail-recursive function to print all numbers from n to 1\r\nfunc print_num(n int) {\r\n\r\n    \/\/ if a number is still  positive, print it and call the function with the decremented value\r\n    if n > 0 {\r\n        fmt.Println(n)\r\n\r\n        \/\/  last statement in  the recursive function tail recursive call\r\n        print_num(n - 1)\r\n    }\r\n}\r\n\r\n\/\/ main function\r\nfunc main() {\r\n\r\n    \/\/ passing a positive number, prints 5 to 1\r\n    print_num(5)\r\n}\r\n<\/pre>\n
      Output :<\/p>\n
      PS C:\\GO_Language\\recursion> go run rec3.go       \r\n5\r\n4\r\n3\r\n2\r\n1\r\n<\/pre>\n
       <\/li>\n
    4. Head Recursion :<\/u><\/strong><\/strong> Golang program to illustrate the concept of head recursion<\/u>\n
      package main\r\n\r\nimport (\r\n    \"fmt\"\r\n)\r\n\r\nfunc print_num(n int) {\r\n\r\n    if n > 0 {\r\n        print_num(n - 1)\r\n        fmt.Println(n)\r\n    }\r\n}\r\nfunc main() {\r\n    print_num(5)\r\n}\r\n<\/pre>\n
      Output :<\/p>\n
      PS C:\\GO_Language\\recursion> go run rec4.go\r\n1\r\n2\r\n3\r\n4\r\n5\r\n<\/pre>\n
       <\/li>\n
    5. Infinite Recursion :<\/u><\/strong><\/strong>Infinite repetition occurs when the second condition is not followed. , There’s an infinite recursion in action here\n
      package main\r\n\r\nimport (\r\n    \"fmt\"\r\n)\r\n\r\nfunc print_hello() {\r\n    fmt.Println(\"Prwatech\")\r\n    print_hello()\r\n}\r\nfunc main() {\r\n    print_hello()\r\n}\r\n<\/pre>\n
      Output :<\/p>\n
      PS C:\\GO_Language\\recursion> go run rec5.go\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\nPrwatech\r\n\r\nexit status 0xc000013a\r\n<\/pre>\n
      Different Types of Recursion in Golang<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
      Different Types of Recursion in Golang   Recursion in Go (Golang) refers to a programming technique where a function calls itself directly or indirectly to solve a problem. There are different types of recursion that can be applied in Go based on how the recursive calls are made and the structure of the recursive function. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[666,1707],"tags":[1601,1600,1602,1312,1187],"class_list":["post-9882","post","type-post","status-publish","format-standard","hentry","category-go-lang","category-golang-modules","tag-head-recursion","tag-indirect-recursion","tag-infinite-recursion","tag-recursion-in-golang","tag-tail-recursion"],"acf":[],"yoast_head":"\nDifferent Types of Recursion in Golang - Prwatech<\/title>\n<meta name=\"description\" content=\"Master Different Types of Recursion in Golang - Dive deep with our expert instructors and comprehensive curriculum.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Different Types of Recursion in Golang - 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