基本

一些基本操作

println

package main
import "fmt"

func main(){
    fmt.Println("go" + "lang")
    fmt.Println("1+1 =", 1+1)
    fmt.Println("7.0/3.0 =", 7.0/3.0)
    fmt.Println(true && false)
    fmt.Println(true || false)
    fmt.Println(!true)

    // 常量
    const n   =  10000
    fmt.Println("常量:",n)

    // 循环
    strs := []string{"a","b","c"}
    for i,v := range strs{
        fmt.Println("index:",i,"val:",v)
    }

    // 死循环
    for {
        fmt.Println("loop")
        break
    }

    // 切片
    s = make([]string,3)
    fmt.Println("emp:", s, "len:", len(s), "cap:", cap(s))
}