string

bool

int8 uint8

int16 uint16

int32 uint32

int64 uint64

float32 float64

   //demo_1.go    
    package main    
    import (    
        "fmt"    
    )    
    func main() {    
        const name string = "Tom"    
        fmt.Println(name)    
        const age = 30    
        fmt.Println(age)    
        const name_1, name_2 string = "Tom", "Jay"    
        fmt.Println(name_1, name_2)    
        const name_3, age_1 = "Tom", 30    
        fmt.Println(name_3, age_1)    
    }

 //demo_2.go    
    package main    
    import (    
        "fmt"    
    )    
    func main() {    
        var age_1 uint8 = 31    
        var age_2 = 32    
        age_3 := 33    
        fmt.Println(age_1, age_2, age_3)    
        var age_4, age_5, age_6 int = 31, 32, 33    
        fmt.Println(age_4, age_5, age_6)    
        var name_1, age_7 = "Tom", 30    
        fmt.Println(name_1, age_7)    
        name_2, is_boy, height := "Jay", true, 180.66    
        fmt.Println(name_2, is_boy, height)    
    }

    //demo_3.go    
    package main    
    import (    
        "fmt"    
    )    
    func main() {    
        fmt.Print("输出到控制台不换行")    
        fmt.Println("---")    
        fmt.Println("输出到控制台并换行")    
        fmt.Printf("name=%s,age=%d\n", "Tom", 30)    
        fmt.Printf("name=%s,age=%d,height=%v\n", "Tom", 30, fmt.Sprintf("%.2f", 180.567))    
    }