Tcp read bytes len

Getting Help
1 
   buffer:=make([]byte,1024)
   readBytesLen,err:=tcpConn.Read(buffer)

How many conditions will readBytesLen be set value like -1,0,1?

<0 actually is impossible
==0 means read meet some questions like eof
>0 means read is ok

Is there any wrong ?

2

I don’t think the general approach would involve the -1 case. (Unless it’s your own io. Reader)
This value simply indicates how long the data has been read.

3

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