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Variables.go
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Variables.go
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package main
import "fmt"
func main() {
// Declaring variables
var i int
var s string
// Initializing Variables
i = 20
s = "Some String"
fmt.Println(i)
fmt.Println(s)
// Creating and initializing variables
var k int = 35
fmt.Println(k)
//Short variable declaration
j := 50
fmt.Println(j)
// Declaring multiple variables
firstName, lastName := "FirstName", "LastName"
fmt.Println(firstName + lastName)
// Variable Declaration Block
var (
name = "Donald Duck"
age = 50
)
fmt.Println(name)
fmt.Println(age)
{
a := [3]int{1, 2, 3}
for k, v := range a {
if k == 0 {
a[0], a[1] = 100, 200
}
a[k] = 100 + v
fmt.Printf("%T %p\n", v, &v)
}
fmt.Println(a) //数组 101 102 103
}
{
a := []int{1, 2, 3}
for k, v := range a {
if k == 0 {
a[0], a[1] = 100, 200
}
a[k] = 100 + v
fmt.Printf("%T %p\n", v, &v)
}
fmt.Println(a) //数组 101 300 103
}
}