Golang has strconv library that converts string to int64 and uint64.
However, the rest of integer data types seems to be unsupported as I can't find conversion functions for byte, int16, uint16, int32, uint32 data types.
One can always convert from byte, 16-bit and 32-bit data types to int64 and uint64 without loss of precision. Is that what's intended by language?
If you look at the docs a bit more closely you can use this method;
func ParseInt(s string, base int, bitSize int)
https://golang.org/pkg/strconv/#ParseInt
The bitSize argument says how large the int is so you can do 8 or 16 or 32 for those smaller integer types. Atoi calls this internally. I believe you're wanting 10 for the base argument. So like b, err := strconv.ParseInt("5", 10, 8) for a byte.
EDIT: Just going to add a couple things to the answer here in case the OP is in fact confused how to convert a 16-bit int into a string... If that is your intended goal just use fmt.Sprintf or you can do a conversion from smaller int to larger int as it will always succeed. Examples of both here;
package main
import "fmt"
import "strconv"
func main() {
var a int16
a = 5
s := fmt.Sprintf("%d", a)
s2 := strconv.Itoa(int(a))
fmt.Println(s)
fmt.Println(s2)
}
ParseInt converts from a string to an integer. The question is asking about the other direction - converting to a string.
strconv the methods in fmt are perfectly sufficient. Lastly, if I have an 32-bit int and a 'itoa' method that only works for 64-bit as the OP points out it's very obvious what needs to be done which is a cast to (int64) which will always succeed...For example,
package main
import (
"fmt"
"strconv"
)
func main() {
n := int16(42)
s := strconv.FormatInt(int64(n), 10)
fmt.Printf("n %d s %q\n", n, s)
}
Output:
n 42 s "42"
You can convert any int type to string using fmt.Sprintf() method
var num int64
numstring:=fmt.Sprintf("%d",num)
[]byte(s)to set a string to a slice of uint8 or[]rune(s)to set a string to a slice of int32. See stackoverflow.com/a/62740786/12817546.string([]byte(s))orstring([]rune(s))to set a slice of bytes or runes to a string. See stackoverflow.com/a/62725637/12817546 and stackoverflow.com/a/62739051/12817546.