Clarify the type of variadic params with a comment

examples/variadic-functions/variadic-functions.go

@@ -12,6 +12,9 @@ import "fmt"
 func sum(nums ...int) {
 	fmt.Print(nums, " ")
 	total := 0
+	// Within the function, the type of `nums` is
+	// equivalent to `[]int`. We can call `len(nums)`,
+	// iterate over it with `range`, etc.
 	for _, num := range nums {
 		total += num
 	}

examples/variadic-functions/variadic-functions.hash

@@ -1,2 +1,2 @@
-dd2e819d49c1110c7eb7dc198b62e0994e0ba93e
-7_-i75JEsmM
+561184169a1b4c3d4970d496b282cc81016583d6
+glNdE8aKPNq