Golang变量声明与初始化全解析

var name type // 声明但不初始化，变量会被赋予零值

var age int // age 的值为 0

var name string // name 的值为 ""（空字符串）

var isOk bool // isOk 的值为 false

var age int = 25

var name string = "Alice"

var count = 10 // 类型自动推断为 int

var msg = "Hello" // 类型自动推断为 string

var x, y int = 1, 2

var a, b, c = 1, "hello", true // 类型各自推断

var (

name = "Bob"

age = 30

isStudent bool

)

func main() {

name := "Charlie"

age := 28

height, weight := 175.5, 70.0

isActive := true

}

var s string

fmt.Println(s) // 输出空字符串

package main

import "fmt"

var globalVar = "I'm global"

var (

appVersion = "1.0"

debugMode = true

)

func main() {

var age int = 25

var name = "David"

city := "Beijing"

var isMarried bool // 零值 false

height, weight := 180.0, 75.5

fmt.Printf("Name: %s, Age: %d, City: %s\n", name, age, city)

fmt.Printf("Married: %t, Height: %.1f, Weight: %.1f\n", isMarried, height, weight)

fmt.Println("Global:", globalVar)

fmt.Println("App Version:", appVersion, "Debug:", debugMode)

}