Added recursive-function.go initial version.

recursive-function.go

@@ -0,0 +1,49 @@
+// Copyright 2018 Gytis Repečka. All rights reserved.
+// Use of this source code is governed by a GNU GPL
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+  "fmt"
+  "bufio"
+  "os"
+  "strings"
+  "strconv"
+)
+
+func factorial(n int) int {
+  if n == 0 {
+    return 1
+  }
+  return n*factorial(n-1)
+}
+
+func main() {
+  reader := bufio.NewReader(os.Stdin)
+  fmt.Print("Input number (and press ENTER): ")
+  inputString, _ := reader.ReadString('\n')
+
+  // Convert CRLF to LF
+  // Windows
+  // inputString = strings.Replace(inputString, "\r\n", "", -1)
+  // Unix
+  inputString = strings.Replace(inputString, "\n", "", -1)
+
+  // Convert string (inputString) to integer (inputInt)
+  var inputInt int
+  inputInt, err := strconv.Atoi(inputString)
+
+  // If there was error converting string to int
+  if err != nil {
+		fmt.Println(err)
+	}
+
+  fmt.Printf("Value (string): %s\n", inputString)
+  fmt.Printf("Value length: %d\n", len(inputString))
+  fmt.Printf("Value (int): %d\n", inputInt)
+  fmt.Println("\n---------------")
+
+  fmt.Printf("Factorial of %d is: %d", inputInt, factorial(inputInt))
+  fmt.Println("\n---------------\n")
+}