go条件语句

package main

import "fmt"

func main(){
    a :=123
    if a>100{
        fmt.prinln("大于100")
     }else{
       fmt.println("小于100")

    }
}

var shuxue int = 300
    switch {
    case shuxue == 100:
        fmt.Println("111")

    case shuxue == 200:
        fmt.Println("222")

    default:
        fmt.Println("ok")
    }

var marks int = 90
var grade string
 switch marks {
    case 90:
        grade = "A"
    case 80:
        grade = "B"

    default:
        grade = "D"
    }
    fmt.Println(grade)