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Go 语言的循环及条件语句

 3 years ago
source link: https://segmentfault.com/a/1190000040173434
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Go 语言只支持 for 循环。

func TestWhileLoop(t *testing.T) {
    n := 0
    for n < 5 {
        n++
        fmt.Println(n)
    }
}
n := 0
for {
    fmt.Println(n)
}

IF条件语句

func TestIf(t *testing.T) {
    if a := 1 == 1; a {
        t.Log("1 == 1")
    }
}

switch 条件语句

Go 语言的 switch 不需要使用 break 来退出一个 case

func TestSwitch(t *testing.T) {
    for i := 0; i < 5; i++ {
        switch i {
            case 0, 2:
                t.Log("Even")
            case 1, 3:
                t.Log("Odd")
            default:
                t.Log("not 0-3")
        }
    }
}

case 中使用表达式：

func TestSwitchCondition(t *testing.T) {
    for i := 0; i < 5; i++ {
        switch {
            case i%2 == 0:
                t.Log("Even")
            case i%2 == 1:
                t.Log("Odd")
            default:
                t.Log("unknow")
        }
    }
}

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