Application
Create new folder named src. In src folder, create new file named main.go as below:
package main
import "fmt"
func main() {
var a int = 1
ChangeValue1(a)
fmt.Println("a:", a)
ChangeValue2(&a)
fmt.Println("a:", a)
b, c := 3, 4
p, q := &b, &c
Swap1(b, c)
fmt.Println("b:", b, ", c:", c)
Swap2(p, q)
fmt.Println("b:", b, ", c:", c)
}
func ChangeValue1(a int) {
a = 2
}
func ChangeValue2(p *int) {
*p = 2
}
func Swap1(a, b int) {
temp := a
a = b
b = temp
}
func Swap2(p, q *int) {
temp := *p
*p = *q
*q = temp
}
Output
Open Terminal windows in Visual Studio Code and run command line: go run main.go
a: 1
a: 2
b: 3 , c: 4
b: 4 , c: 3