Algorithm
In Go (or Golang), variable scope refers to the region of the code where a variable can be accessed or modified. The scope of a variable is determined by its declaration within the code. Go has a block-based scoping mechanism, meaning that variables declared inside a block (such as within a set of curly braces {}) are only accessible within that block.
Code Examples
#1 Go Lang Local Variables
Code -
Golang Programming
// Program to illustrate local variables
package main
import "fmt"
func addNumbers() {
// local variables
var sum int
sum = 5 + 9
}
func main() {
addNumbers()
// cannot access sum out of its local scope
fmt.Println("Sum is", sum)
}Output
undefined: sum
#2 Global Variables in Golang
Code -
Golang Programming
// Program to illustrate global variable
package main
import "fmt"
// declare global variable before main function
var sum int
func addNumbers () {
// local variable
sum = 9 + 5
}
func main() {
addNumbers()
// can access sum
fmt.Println("Sum is", sum)
}Output
Sum is 14
Demonstration
Go Lang Variable Scope