diff --git a/15-floats.go b/15-floats.go
new file mode 100644
index 0000000..f0628d3
--- /dev/null
+++ b/15-floats.go
@@ -0,0 +1,12 @@
+package main
+
+import "fmt"
+
+func main() {
+	x := [5]float64{ 98, 93, 77, 82, 83 }
+	total := 0.0
+	for _, v := range x {
+		total += v
+	}
+	fmt.Println(total / float64(len(x)))
+}
diff --git a/16-slices.go b/16-slices.go
new file mode 100644
index 0000000..364109b
--- /dev/null
+++ b/16-slices.go
@@ -0,0 +1,14 @@
+package main
+
+import "fmt"
+
+func main() {
+    slice1 := []int{1,2,3}
+    slice2 := append(slice1, 4, 5)
+    fmt.Println(slice1)
+	fmt.Println(slice2)
+	slice3 := make([]int, 2)
+	copy(slice3, slice1)
+	fmt.Println(slice1)
+	fmt.Println(slice3)
+}