From bf872f09195a92c31fcd52f8e8fa1a890adcc018 Mon Sep 17 00:00:00 2001
From: jdg <jd@infdj.com>
Date: Tue, 7 Sep 2021 20:21:03 +0000
Subject: [PATCH] more examples

---
 gobyexample/closures.go               | 22 ++++++++++++++++++++++
 gobyexample/functions.go              | 19 +++++++++++++++++++
 gobyexample/multiple-return-values.go | 16 ++++++++++++++++
 gobyexample/recursion.go              | 25 +++++++++++++++++++++++++
 gobyexample/variadic-functions.go     | 20 ++++++++++++++++++++
 5 files changed, 102 insertions(+)
 create mode 100644 gobyexample/closures.go
 create mode 100644 gobyexample/functions.go
 create mode 100644 gobyexample/multiple-return-values.go
 create mode 100644 gobyexample/recursion.go
 create mode 100644 gobyexample/variadic-functions.go

diff --git a/gobyexample/closures.go b/gobyexample/closures.go
new file mode 100644
index 0000000..f215391
--- /dev/null
+++ b/gobyexample/closures.go
@@ -0,0 +1,22 @@
+package main
+
+import "fmt"
+
+func intSeq() func() int {
+	i := 0
+	return func() int {
+		i++
+		return i
+	}
+}
+
+func main() {
+	nextInt := intSeq()
+
+	fmt.Println(nextInt())
+	fmt.Println(nextInt())
+	fmt.Println(nextInt())
+
+	newInts := intSeq()
+	fmt.Println(newInts())
+}
diff --git a/gobyexample/functions.go b/gobyexample/functions.go
new file mode 100644
index 0000000..b2081ee
--- /dev/null
+++ b/gobyexample/functions.go
@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func plus(a int, b int) int {
+	return a+b
+}
+
+func plusPlus(a, b, c int) int {
+	return a + b + c
+}
+
+func main() {
+	res := plus(1, 2)
+	fmt.Println("1+2 =", res)
+	
+	res = plusPlus(1, 2, 3)
+	fmt.Println("1+2+3 =", res)
+}
diff --git a/gobyexample/multiple-return-values.go b/gobyexample/multiple-return-values.go
new file mode 100644
index 0000000..da8515a
--- /dev/null
+++ b/gobyexample/multiple-return-values.go
@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+
+func  vals() (int, int) {
+	return 3,7
+}
+
+func main() {
+	a,b := vals()
+	fmt.Println(a)
+	fmt.Println(b)
+
+	_, c := vals()
+	fmt.Println(c)
+}
diff --git a/gobyexample/recursion.go b/gobyexample/recursion.go
new file mode 100644
index 0000000..cdac8a1
--- /dev/null
+++ b/gobyexample/recursion.go
@@ -0,0 +1,25 @@
+package main
+
+import "fmt"
+
+func fact(n int) int {
+	if n==0 {
+		return 1
+	}
+	return n * fact(n-1)
+}
+
+func main() {
+	fmt.Println(fact(7))
+
+	var fib func(n int) int
+
+	fib = func(n int) int {
+		if n<2 {
+			return n
+		}
+		return fib(n-1) + fib(n-2)
+	}
+
+	fmt.Println(fib(7))
+}
diff --git a/gobyexample/variadic-functions.go b/gobyexample/variadic-functions.go
new file mode 100644
index 0000000..e003341
--- /dev/null
+++ b/gobyexample/variadic-functions.go
@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+func sum(nums ...int) {
+	fmt.Print(nums, " ")
+	total := 0
+	for _, num := range nums {
+		total += num
+	}
+	fmt.Println(total)
+}
+
+func main() {
+	sum(1,2)
+	sum(1,2,3)
+
+	nums := []int{1, 2, 3, 4}
+	sum(nums...)
+}