Several cases go function return value of language

Three cases

(Hereinafter, "specifies a return value", that refers only to return back directly followed by the return value)

• Withdraw, do not specify a return value
  (1) function does not return value

package main
import (
    "fmt"
) func GetMoney(){ fmt.Println("money") return } func main(){ GetMoney() } 

(2) function returns the value of the variable name

package main
import (
    "fmt"
) func GetMoney() (_amount int){ _amount = 88 fmt.Println("money: ",_amount) return } func main(){ var amount = GetMoney() fmt.Println("money: ",amount) } 

• Exit execution, specify a return value

package main
import (
    "fmt"
) func GetMoney() (_amount int){ fmt.Println("money: ",_amount) return 88 } func main(){ var amount = GetMoney() fmt.Println("money: ",amount) } 运行结果： money: 0 money: 88 

• Exit execution, specify the return value and specify a default value

package main
import (
    "fmt"
) func GetMoney() (_amount int){ _amount = 99 //如果return后面没有指定返回值，就用赋给“返回值变量”的值 fmt.Println("money: ",_amount) return 88 //如果return后面跟有返回值，就使用return后面的返回值 } func main(){ var amount = GetMoney() fmt.Println("money: ",amount) } 运行结果： money: 99 money: 88