diff --git a/Section4/iota/main.go b/Section4/iota/main.go
new file mode 100644
index 0000000..eab9134
--- /dev/null
+++ b/Section4/iota/main.go
@@ -0,0 +1,27 @@
+package main
+
+import "fmt"
+
+func main() {
+	const (
+		c1 = iota
+		c2 = iota
+		c3 = iota
+	)
+	fmt.Println(c1, c2, c3)
+
+	const (
+		a = (iota * 2) + 1
+		b
+		c
+	)
+	fmt.Println(a, b, c)
+
+	const (
+		x = -(iota + 2)
+		_
+		y
+		z
+	)
+	fmt.Println(x, y, z)
+}