go tips
go mod init dcs.com/mainproj
go run mainproj.go (a file) to run it go build mainproj.go - to generate a binary executable
create a directory messages/somemessage.go within it - package messages
the above can be imported import dcs.com/mainproj/messages
Capital first letter -> exported
require ... replace ... to use multiple packages within one folder
constants have a "kind"i.e. integer, floating, etc // const has enormous range and precision, calculations are in compiler // variables have a type
const iota -> increments automatically at every line
pointer &value *address
fmt.Printf（ format: "strprt is %v type %T address： %p\n", strptr,strptr,strptr）
slice vs array
1a ：= ［4]int｛｝// arrays have fixed size //1a ：= ［]int{l,2,3,4｝ // S11ce--MoT the same as an array can change “s1ze"of S11ce
we use slice more than array