</pre>

<p>
In a function without a result type, a "return" statement must not
specify any result values.
</p>
<pre>
func noResult() {
	return
}
</pre>

<p>
There are three ways to return values from a function with a result
type:
</p>

<ol>
	<li>The return value or values may be explicitly listed

//export goReturnVal
func goReturnVal() (r C.int) {
	// Force a stack copy.
	var f func(int) int
	f = func(i int) int {
		var buf [256]byte
		use(buf[:])
		if i == 0 {
			return 0
		}
		return i + f(i-1)
	}
	r = C.int(f(128))
	return
}

// Test that C can pass in a Go string from a string constant.
func testCallGoWithString(t *testing.T) {
	C.callGoWithString()
	want := "string passed from C to Go"