GOMAXPROCS

What will be printed when the code below is executed?Will it be different when line A is changed to GOMAXPROCS=2 ? 

  1. package main
  3. import (
  4.     "fmt"
  5.     "runtime"
  6.     "sync"
  7. )
  9. func main() {
  10.     const GOMAXPROCS = 4 //A
  11.     runtime.GOMAXPROCS(GOMAXPROCS)
  13.     var wg sync.WaitGroup
  14.     wg.Add(2)
  16.     go func() {
  17.         defer wg.Done()
  18.         for char := 0; char < 26; char++ {
  19.             fmt.Printf("%c ", 'A'+char)
  20.         }
  21.     }()
  22.     go func() {
  23.         defer wg.Done()
  24.         for char := 0; char < 26; char++ {
  25.             fmt.Printf("%c ", 'a'+char)
  26.         }
  27.     }()
  29.     wg.Wait()
  30. }

Answer

  2. When GOMAXPROCS=1, the printed output will be a-zA-Z.
  3. When GOMAXPROCS=2, a-z will be mixed with A-Z.
  4.