Deferred function calls are pushed onto a stack. When a function returns, its deferred calls are executed in last-in-first-out order.
lets write a program to count numbers from 1 to 9
package main
import "fmt"
func main() {
fmt.Println("counting")
for i := 0; i < 10; i++ {
fmt.Println(i)
}
fmt.Println("done")
}
Stacking defers - use defer defer fmt.Println(i). because of defer its give you output of last result in first thats
known as last-in-first out manner
package main
import "fmt"
func main() {
fmt.Println("counting")
for i := 0; i < 10; i++ {
defer fmt.Println(i)
}
fmt.Println("done")
}
Important:
for i := 0; i < 10; i++ {
defer fmt.Println(i)
}
output:
counting
done
9
8
7
6
5
4
3
2
1
0