diff --git a/tuple/tuple_example_test.go b/tuple/tuple_example_test.go
new file mode 100644
index 0000000..672e75f
--- /dev/null
+++ b/tuple/tuple_example_test.go
@@ -0,0 +1,143 @@
+// Copyright 2023 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package tuple implements tuple data type and some operations on it.
+package tuple
+
+import "fmt"
+
+func ExampleNewTuple2() {
+	t := NewTuple2(1, 0.1)
+	fmt.Printf("%v %v", t.FieldA, t.FieldB)
+	// Output: 1 0.1
+}
+
+func ExampleTuple2_Unbox() {
+	// type foo struct {
+	// 	A string
+	// }
+
+	// t2 := NewTuple2(1, 0.1)
+	// t3 := NewTuple3[int, float64, string](1, 0.1, "a")
+	// t4 := NewTuple4[int, float64, string, bool](1, 0.1, "a", true)
+	// t5 := NewTuple5[int, float64, string, bool, int64](1, 0.1, "a", true, 2)
+	// t6 := NewTuple6[int, float64, string, bool, int64, float32](1, 0.1, "a", true, 2, 2.2)
+	// t7 := NewTuple7[int, float64, string, bool, int64, float32, string](1, 0.1, "a", true, 2, 2.2, "b")
+	// t8 := NewTuple8[int, float64, string, bool, int64, float32, string, string](1, 0.1, "a", true, 2, 2.2, "b", "c")
+	// t9 := NewTuple9[int, float64, string, bool, int64, float32, string, string, map[string]int](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	// t10 := NewTuple10[int, float64, string, bool, int64, float32, string, string, map[string]int, foo](1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+
+	t := NewTuple2(1, 0.1)
+	v1, v2 := t.Unbox()
+	fmt.Printf("%v %v", v1, v2)
+	// Output: 1 0.1
+}
+
+func ExampleNewTuple3() {
+	t := NewTuple3(1, 0.1, "a")
+	fmt.Printf("%v %v %v", t.FieldA, t.FieldB, t.FieldC)
+	// Output: 1 0.1 a
+}
+
+func ExampleTuple3_Unbox() {
+	t := NewTuple3(1, 0.1, "a")
+	v1, v2, v3 := t.Unbox()
+	fmt.Printf("%v %v %v", v1, v2, v3)
+	// Output: 1 0.1 a
+}
+
+func ExampleNewTuple4() {
+	t := NewTuple4(1, 0.1, "a", true)
+	fmt.Printf("%v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD)
+	// Output: 1 0.1 a true
+}
+
+func ExampleTuple4_Unbox() {
+	t := NewTuple4(1, 0.1, "a", true)
+	v1, v2, v3, v4 := t.Unbox()
+	fmt.Printf("%v %v %v %v", v1, v2, v3, v4)
+	// Output: 1 0.1 a true
+}
+
+func ExampleNewTuple5() {
+	t := NewTuple5(1, 0.1, "a", true, 2)
+	fmt.Printf("%v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE)
+	// Output: 1 0.1 a true 2
+}
+
+func ExampleTuple5_Unbox() {
+	t := NewTuple5(1, 0.1, "a", true, 2)
+	v1, v2, v3, v4, v5 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v", v1, v2, v3, v4, v5)
+	// Output: 1 0.1 a true 2
+}
+
+func ExampleNewTuple6() {
+	t := NewTuple6(1, 0.1, "a", true, 2, 2.2)
+	fmt.Printf("%v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF)
+	// Output: 1 0.1 a true 2 2.2
+}
+
+func ExampleTuple6_Unbox() {
+	t := NewTuple6(1, 0.1, "a", true, 2, 2.2)
+	v1, v2, v3, v4, v5, v6 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v", v1, v2, v3, v4, v5, v6)
+	// Output: 1 0.1 a true 2 2.2
+}
+
+func ExampleNewTuple7() {
+	t := NewTuple7(1, 0.1, "a", true, 2, 2.2, "b")
+	fmt.Printf("%v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG)
+	// Output: 1 0.1 a true 2 2.2 b
+}
+
+func ExampleTuple7_Unbox() {
+	t := NewTuple7(1, 0.1, "a", true, 2, 2.2, "b")
+	v1, v2, v3, v4, v5, v6, v7 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7)
+	// Output: 1 0.1 a true 2 2.2 b
+}
+
+func ExampleNewTuple8() {
+	t := NewTuple8(1, 0.1, "a", true, 2, 2.2, "b", "c")
+	fmt.Printf("%v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH)
+	// Output: 1 0.1 a true 2 2.2 b c
+}
+
+func ExampleTuple8_Unbox() {
+	t := NewTuple8(1, 0.1, "a", true, 2, 2.2, "b", "c")
+	v1, v2, v3, v4, v5, v6, v7, v8 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8)
+	// Output: 1 0.1 a true 2 2.2 b c
+}
+
+func ExampleNewTuple9() {
+	t := NewTuple9(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	fmt.Printf("%v %v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI)
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1]
+}
+
+func ExampleTuple9_Unbox() {
+	t := NewTuple9(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9)
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1]
+}
+func ExampleNewTuple10() {
+	type foo struct {
+		A string
+	}
+	t := NewTuple10(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+	fmt.Printf("%v %v %v %v %v %v %v %v %v %v", t.FieldA, t.FieldB, t.FieldC, t.FieldD, t.FieldE, t.FieldF, t.FieldG, t.FieldH, t.FieldI, t.FieldJ)
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
+}
+
+func ExampleTuple10_Unbox() {
+	type foo struct {
+		A string
+	}
+	t := NewTuple10(1, 0.1, "a", true, 2, 2.2, "b", "c", map[string]int{"a": 1}, foo{A: "a"})
+	v1, v2, v3, v4, v5, v6, v7, v8, v9, v10 := t.Unbox()
+	fmt.Printf("%v %v %v %v %v %v %v %v %v %v", v1, v2, v3, v4, v5, v6, v7, v8, v9, v10)
+	// Output: 1 0.1 a true 2 2.2 b c map[a:1] {a}
+}