go語音基礎之變數和常量
阿新 • • 發佈：2018-12-30
1、多個變數
示例1：
package main
import "fmt"
func main() {
//不同型別變數的宣告(定義)
var a int
var b float64
a, b = 10, 3.14
fmt.Println("a = ", a)
fmt.Println("b = ", b)
}
#執行結果
a = 10 b = 3.14
示例2：
package main
import "fmt"
func main() {
//不同型別變數的宣告(定義)
var (
a int
b float64
)
a, b = 10, 3.14
fmt.Println("a = ", a)
fmt.Println("b = ", b)
}
#執行結果
a = 10 b = 3.14
示例3：
package main
import "fmt"
func main() {
//可以自動推導型別
var (
a = 1
b = 2.0
)
a, b = 10, 3.14
fmt.Println("a = ", a)
fmt.Println("b = ", b)
}
#執行結果
a = 10 b = 3.14
2、常量
示例1：
package main
import "fmt"
func main() {
const i int = 10
const j float64 = 3.14
fmt.Println("i = ", i)
fmt.Println("j = ", j)
}
#執行結果
i = 10 j = 3.14
示例2
package main
import "fmt"
func main() {
const (
i int = 10
j float64 = 3.14
)
fmt.Println("i = ", i)
fmt.Println("j = ", j)
}
#執行結果
i = 10 j = 3.14
示例3
package main
import "fmt"
func main() {
//自動推導型別
const (
i = 10
j = 3.14
)
fmt.Println("i = ", i)
fmt.Println("j = ", j)
}
#執行結果
i = 10 j = 3.14