feat: pointers, runes, structs

go-by-example/pointers/pointers.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+// This functions creates a copy of the argument and does not change the original
+func zeroval(ival int) {
+	ival = 0
+}
+
+// Changes the value of the argument because it is a pointer.
+func zeroptr(iptr *int) {
+	*iptr = 0
+}
+
+func main() {
+	i := 1
+	fmt.Println("initial", i)
+
+	zeroval(i)
+	fmt.Println("zeroval", i)
+	// & operand means the address of the variable. Creates a pointer when a function needs that as argument
+	zeroptr(&i)
+	fmt.Println("zeroptr:", i)
+
+	fmt.Println("Poiner:", &i)
+}