diff --git a/golangr/range/go.mod b/golangr/range/go.mod
index 3b0f1c2..ff2ac0c 100644
--- a/golangr/range/go.mod
+++ b/golangr/range/go.mod
@@ -1,3 +1,5 @@
 module range
 
 go 1.21.6
+
+require git.bulgariu.xyz/raul/min-max-array v0.0.0-20240130184833-a25a49c11fc5
diff --git a/golangr/range/go.sum b/golangr/range/go.sum
new file mode 100644
index 0000000..22a3196
--- /dev/null
+++ b/golangr/range/go.sum
@@ -0,0 +1,2 @@
+git.bulgariu.xyz/raul/min-max-array v0.0.0-20240130184833-a25a49c11fc5 h1:+4SdxwW8y687yR/ctDOdmcuJGxcI0oLPiNOrg28zSIo=
+git.bulgariu.xyz/raul/min-max-array v0.0.0-20240130184833-a25a49c11fc5/go.mod h1:PdMyknNgNZYKg03bYhSc4aaSA/P3yScGPfxC4z+ju0c=
diff --git a/golangr/range/main.go b/golangr/range/main.go
index 17b895a..e4f8425 100644
--- a/golangr/range/main.go
+++ b/golangr/range/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"git.bulgariu.xyz/raul/min-max-array"
 	"os"
 	//"log"
 )
@@ -40,7 +41,10 @@ func msg() {
 func choices() {
 	for {
 		fmt.Printf("Choice: ")
-		fmt.Scan(&choice)
+		_, err := fmt.Scan(&choice)
+		if err != nil {
+			fmt.Println(err)
+		}
 		switch choice {
 		case 1:
 			addVec()
@@ -49,22 +53,22 @@ func choices() {
 		case 3:
 			average()
 		case 4:
+			getMinMax()
 		case 5:
 			resetGrades()
 		case 6:
-			fmt.Println("Have a nice day")
+			fmt.Println("Have a nice day!")
 			os.Exit(0)
 		default:
+			clear()
 			msg()
-			fmt.Println("Another one")
+			fmt.Printf("\n-----------------------------------------------\n")
+			fmt.Printf("ERROR: Invalid input\n")
+			fmt.Printf("-----------------------------------------------\n\n")
 		}
 	}
 }
 
-func total(num float64) {
-
-}
-
 func average() {
 	clear()
 	msg()
@@ -75,16 +79,24 @@ func average() {
 
 	notaMedia := notaSumada / float64(len(notas))
 	fmt.Printf("\n-----------------------------------------------")
-	fmt.Printf("\nAll your grades combine to %v\n", notaSumada)
-	fmt.Printf("Your average grade is %v\n", notaMedia)
+	fmt.Printf("\nAll your grades combine to %.2v\n", notaSumada)
+	fmt.Printf("Your average grade is %.2v\n", notaMedia)
 	fmt.Printf("-----------------------------------------------\n\n")
 
 	notaSumada = 0
 	notaMedia = 0
 }
 
-func minmax() {
-
+func getMinMax() {
+	clear()
+	msg()
+	// Me finally getting to make use of my first library :)
+	minNota := minmax.Min(notas)
+	maxNota := minmax.Max(notas)
+	fmt.Printf("\n-----------------------------------------------")
+	fmt.Printf("\nLargest grade: %v\n", maxNota)
+	fmt.Printf("Smallest grade: %v\n", minNota)
+	fmt.Printf("-----------------------------------------------\n\n")
 }
 
 func resetGrades() {
@@ -100,14 +112,10 @@ func addVec() {
 	clear()
 	fmt.Println("Add a number to your vector")
 	fmt.Printf("Number: ")
-	fmt.Scanln(&numToAdd)
-
-	// TODO: get error handling going after initial functionality is done
-	// if len(numToAdd) == 0 {
-	//
-	// } else {
-	//
-	// }
+	_, err := fmt.Scanln(&numToAdd)
+	if err != nil {
+		fmt.Println(err)
+	}
 
 	notas = append(notas, numToAdd)
 	clear()