>[success] ## 1）賦值基本案例 有兩個變量，a和b，要求將其進行交換，最終打印結果 ``` package main import "fmt" func main() { var age = 18 var sum = 20 fmt.Printf("交換前\nage = %v\nsum = %v\n",age,sum) t := age age = sum sum = t fmt.Printf("交換后\nt = %v\nage = %v\nsum = %v\n",t,age,sum) } ``` <br> >[info] **運行結果：** `交換前` `age = 18` `sum = 20` `交換后` `t = 18` `age = 20` `sum = 18` <br> <br> >[success] ## 2）+=的使用案例 ``` package main import "fmt" func main() { var s = 10 s += 20 fmt.Printf("s = %v",s) } ``` <br> >[info] **運行結果：** `s = 30`