tweak

021-varadic.go

@@ -1,18 +1,27 @@
-package main                          // Varadic functions can be called with any number of
-                                      // trailing arguments.
+package main                   // Varadic functions can be called with any number of
+                               // trailing arguments.
 import "fmt"
 
-func add(nums ...int) int {           // Varadic args are declared with `...type` and passed in as
-    for _, num := range nums {        // a slice.
+func add(nums ...int) int {    // Varadic args are declared with `...type` and
+    fmt.Print(nums, " ")       // passed in as a slice.
+    total := 0
+    for _, num := range nums {        
         total += num                
     }
     return total                    
 }                                   
                                     
 func main() {                       
-    fmt.Println(add(1, 2))            // Varadic functions can be called in the usual way.
-    fmt.Println(add(1, 2, 3, 4))    
+    fmt.Println(add(1, 2))     // Varadic functions can be called in the usual way.
+    fmt.Println(add(1, 2, 3))    
                                     
-    nums := []int{2, 3, 4, 5}         // If you already have multiple args in a `slice`, apply
-    fmt.Println1(add(1, nums...))     // them to a varadic function using `func(arg, slice...)`.
-}
+    nums := []int{1, 2, 3, 4}  // If you already have multiple args in a slice,
+    fmt.Println(add(nums...))  // apply them to a varadic function using `
+}                              // func(slice...)`.
+
+/*
+$ go run varadic.go
+[1 2] 3
+[1 2 3] 6
+[1 2 3 4] 10
+*/