Initial data commit

Task/Call-a-function/Go/call-a-function-11.go

@@ -0,0 +1,21 @@
+package main
+
+import "fmt"
+
+// int parameter, so arguments will be passed to it by value.
+func zeroval(ival int) {
+	ival = 0
+}
+// has an *int parameter, meaning that it takes an int pointer.
+func zeroptr(iptr *int) {
+	*iptr = 0
+}
+func main() {
+	i := 1
+	fmt.Println("initial:", i) // prt initial: 1
+	zeroval(i)
+	fmt.Println("zeroval:", i) // prt zeroval: 1
+	zeroptr(&i)
+	fmt.Println("zeroptr:", i)  // prt zeroptr: 0
+	fmt.Println("pointer:", &i) // prt pointer: 0xc0000140b8
+}