go - Why is this program producing output -

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I'm new to google from GO here is a program in Buffered Channels: 

  package main import "fmt" import "time" func main () {c: = make (chan int, 2) c & lt; - 1 fmt println (& lt; -c) time.Sleep (1000 * time.Millisecond) c & lt; - 2 fmt.Println (& lt; -c)}   
 produces the product. But according to this it says:  
 
 A buffer sends the channel block when the buffer is  full . The block is received when buffer is empty.   
 As it says when only the  full  program is completed in the  c  first statement?  
  
 
 
 Your channel has a buffer size, you are pulling an int after inserting an int. Then you sleep and repeat the process. The channel will not block unless you try to insert a third intrate without dragging any intersection. The first two bricks will be buffer.

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