go语言10常量变量表达式2

package main

import "fmt"
/*
常量,变量,表达式
*/
func  main021()  {
/*
一次性声明多个常量
一次性声明多个变量
    */
}
func main()  {
    fmt.Println( "我又活过来了")
//  main021()
    const (
        lightSpeed = 30 * 10000
        earthCircle = 40000

    )
    fmt.Println("光速常量是",lightSpeed,"地球常量周长是",earthCircle)
    //一次性声明多个变量
    var (
        age= 20
     height = 175
     weight = 60
    )
    fmt.Println( "年龄变量是",age,"身高变量是",height,"体重变量是",weight)
/*修改变量的值*/
    age = 30
    height = 175
    weight = 80
    fmt.Println( "年龄变量是",age,"身高变量是",height,"体重变量是",weight)
}