25个保留字
break | default | func | interface | select |
case | defer | go | map | struct |
chan | else | if | goto | pacakge |
switch | fallthrough | range | type | continue |
for | import | return | var | const |
36个预定义标识符
append | bool | byte | cap | close | complex |
complex64 | complex128 | uint8 | copy | false | float32 |
float64 | imag | int | int8 | int16 | int32 |
int64 | iota | len | make | new | recover |
nil | panic | println | real | uint64 | |
string | uint16 | true | uint32 |