Function zeroval

examples/pointers/pointers.go:14–16

We'll show how pointers work in contrast to values with 2 functions: `zeroval` and `zeroptr`. `zeroval` has an `int` parameter, so arguments will be passed to it by value. `zeroval` will get a copy of `ival` distinct from the one in the calling function.

(ival int)

// value. `zeroval` will get a copy of `ival` distinct
// from the one in the calling function.
func zeroval(ival int) {
	ival = 0
}

// `zeroptr` in contrast has an `*int` parameter, meaning
// that it takes an `int` pointer. The `*iptr` code in the