package main

import "fmt"

func main() {
  sum := 0
  for i := 0; i < 10; i++ {
    sum += i
  }
  fmt.Println(sum)
}

package main

import "fmt"

func main() {
  sum := 1
  for ; sum < 1000; {
    sum += sum
  }
  fmt.Println(sum)
}

package main

import "fmt"

func main() {
  sum := 1
  for sum < 1000 {
    sum += sum
  }
  fmt.Println(sum)
}

package main

func main() {
  for ; ; {
  }
}

package main

func main() {
  for {
  }
}

package main
 
import (
 "fmt"
 "time"
)
 
func main() {
 timeout := time.After(time.Second * 10)
 finish := make(chan bool)
 count := 1
 go func() {
 for {
 select {
 case <-timeout:
 fmt.Println("timeout")
 finish <- true
 return
 default:
 fmt.Printf("haha %d\n", count)
 count++
 }
 time.Sleep(time.Second * 1)
 }
 }()
 
 <-finish
 
 fmt.Println("Finish")
}

haha 1
haha 2
haha 3
haha 4
haha 5
haha 6
haha 7
haha 8
haha 9
haha 10
timeout
Finish