Linear search with recursive

searching/linearSearchRecursive.go

@@ -0,0 +1,46 @@
+package searching
+
+import "fmt"
+
+// recursion is a programming technique using function or
+//algorithm that calls itself one or more times until a specified condition is met at which time the rest of each repetition
+// is processed from the last one called to the first.
+
+//If the size of the array is zero then, return -1,
+//representing that the element is not found. This can also be treated as the base condition of a recursion call
+//Otherwise, check if the element at the current index in the array is equal to the key or not i.e, arr[size – 1] == key
+//If equal, then return the index of the found key
+
+func searchRecursive(arr []int, size int, key int) int {
+
+	if key == 0 { // The key is zero return -1
+		return -1
+	}
+
+	if arr[size-1] == key {
+		//return index of found key
+		return size - 1
+	} else {
+		ans := searchRecursive(arr, size-1, key)
+		return ans
+	}
+
+}
+
+func main() {
+
+	searchValue := 100
+	size := 9
+
+	arr := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
+
+	fmt.Println(arr)
+
+	ans := searchRecursive(arr, size, searchValue)
+	if ans == -1 {
+		fmt.Println("Key not found")
+	} else {
+		fmt.Printf("Key found at position: %d\n", ans)
+	}
+
+}