diff --git a/ch1/echo1.go b/ch1/echo1.go
new file mode 100644
index 0000000..3b0324f
--- /dev/null
+++ b/ch1/echo1.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	var s, sep string
+
+	for i := 1; i < len(os.Args); i++ {
+		s += sep + os.Args[i]
+		sep = "|"
+	}
+
+	fmt.Println(s)
+}
\ No newline at end of file