Go 流程控制

if语句使用

package mainimport "fmt"func main() {score := 700if score == 700 {fmt.Println("清华")}//if支持一个初始化语句  初始化语句和条件判断用;分割if a := 700; a == 700 {fmt.Println("清华")}}清华
清华

if_else使用

package mainimport "fmt"func main() {//if支持一个初始化语句  初始化语句和条件判断用;分割if a := 700; a == 700 {fmt.Println("清华")} else {fmt.Println("回家种地")}
}清华

switch使用

package mainimport "fmt"func main() {var score int = 85switch score {case 90:fmt.Println("A")case 80, 85:fmt.Println("B")case 70:fmt.Println("C")}
}

for循环

package mainimport "fmt"func main() {sum := 0for i := 1; i < 11; i++ {sum = sum + i}println(sum)// 迭代打印每个元素 默认返回两个值str := "abc"for i, data := range str {fmt.Println(i, data)}}55
0 97
1 98
2 99

循环练习
一只公鸡值5钱，一只母鸡值三钱，三只小鸡值一钱，现在用百钱买买鸡，公鸡，母鸡，小鸡各多少只

package mainimport "fmt"func main() {// cock 公鸡个数  hen母鸡个数  chicken小鸡个数for cock := 0; cock <= 20; cock++ {for hen := 0; hen <= 30; hen++ {for chicken := 0; chicken <= 100; chicken += 3 {if cock+hen+chicken == 100 && cock*5+hen*3+chicken/3 == 100 {fmt.Println(cock, hen, chicken)}}}}
}package mainimport "fmt"func main() {// cock 公鸡个数  hen母鸡个数  chicken小鸡个数for cock := 0; cock <= 20; cock++ {for hen := 0; hen <= 30; hen++ {chicken := 100 - cock - henif chicken%3 == 0 && cock*5+hen*3+chicken/3 == 100 {fmt.Println(cock, hen, chicken)}}}
}

跳转语句

package mainimport "fmt"func main() {// goto跳转fmt.Println("aaaaaa")goto Endfmt.Println("bbbbbb")
End:fmt.Println("cccccc")
}

会进入死循环

package mainimport "fmt"func main() {// goto跳转fmt.Println("aaaaaa")fmt.Println("bbbbbb")
End:fmt.Println("cccccc")goto End
}