diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..bbee372
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module implementation.go
+
+go 1.22.3
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..0879582
--- /dev/null
+++ b/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+func calculateSum(number int) int {
+	sum := 0
+	for i := 1; i <= number; i++ {
+		sum += i
+	}
+	return sum
+}
+func hello(w http.ResponseWriter, req *http.Request) {
+	myURL := "https://localhost:8090/?n=10"
+	parsedURL, err := url.Parse(myURL)
+	if err != nil {
+		fmt.Println("Can't parse URL", err)
+		return
+	}
+	parts := strings.Split(parsedURL.RawQuery, "=")
+	n, err := strconv.Atoi(parts[1])
+	if err != nil {
+		fmt.Println("number is not found", err)
+		return
+	}
+	var res int = calculateSum(n)
+	fmt.Fprintf(w, "The sum from 1 to %d is: %d", n, res)
+}
+
+func main() {
+	http.HandleFunc("/", hello)
+	http.ListenAndServe(":8090", nil)
+}