Learning about formatIO

functions/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.27.0

functions/main.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func do(m1 *map[int]int) {
+	(*m1)[0] = 0
+
+	*m1 = make(map[int]int)
+	(*m1)[10] = 10
+	fmt.Println("m1", *m1)
+}
+
+func main() {
+	m := map[int]int{1: 21, 2: 56, 3: 45}
+
+	fmt.Println("m", m)
+	do(&m)
+	fmt.Println("m", m)
+}