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package main import ( "errors" "fmt" "strings" ) // Multiple return values — result and error func divide(a, b float64) (float64, error) { if b == 0 { return 0, errors.New("division by zero") } return a / b, nil } // Named return values func minMax(nums []int) (min, max int) { min, max = nums[0], nums[0] for _, n := range nums[1:] { if n < min { min = n } if n > max { max = n } } return // bare return uses named values } // Variadic function func join(sep string, words ...string) string { return strings.Join(words, sep) } func main() { result, err := divide(10, 3) if err != nil { fmt.Println("error:", err) } else { fmt.Printf("10 / 3 = %.4f ", result) } _, err = divide(5, 0) fmt.Println("divide by zero:", err) lo, hi := minMax([]int{3, 1, 4, 1, 5, 9, 2, 6}) fmt.Printf("min=%d max=%d ", lo, hi) fmt.Println(join(", ", "Go", "is", "great")) }
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