Why is []byte value displayed differently in different cases?

Question

go

Why is the []byte slice value displayed differently?
var x int = 5
var y string = string(x) //
var z = []byte(y) // [5]

var str string = string([]byte{5}) //
https://play. golang.org/p/m-tGRG91XPa

And there - why is x also unreadable?

Answer 1

By converting an int to a string(int) you will not get a string with the value "5" you will get a string with character number 5 in utf8.
For this reason, it is not visible, it is not a printable character www.fileformat.info/info/unicode/char/0005/index.htm
In the case of output as an array of bytes, you will get the original numeric value, but not its character representation.