Convert Int to String Golang

Hi sobat Kekasi. to convert Int variable to String. Go (Golang) already provides the “strconv” package library.

To convert an Integer value to a string in golang, we can use the FormatInt function from the strconv package.

package main

import (
	"fmt"
	"strconv"
)

func main() {
	v := int64(-42)

	s10 := strconv.FormatInt(v, 10)
	fmt.Printf("%T, %v\n", s10, s10)

	s16 := strconv.FormatInt(v, 16)
	fmt.Printf("%T, %v\n", s16, s16)

}

Output:

string, -42
string, -2a

FormatInt returns the string representation of i in the given base, for 2 <= base <= 36. The result uses the lower-case letters ‘a’ to ‘z’ for digit values >= 10.

So all you need is an integer value and the given integer base. There is a simpler function you can use if you want to convert an integer base to an ASCII string. namely Itoa.

package main

import (
	"fmt"
	"strconv"
)

func main() {
	i := 10
	s := strconv.Itoa(i)
	fmt.Printf("%T, %v\n", s, s)

}

Output:

string, 10

Itoa is equivalent to FormatInt(int64(i), 10).

Let’s practice. how can we use the Atoi and FormatInt functions to convert integers to ASCII

package main

import (
  "fmt"
  "strconv"
)

func main() {
  i := 10
  s1 := strconv.FormatInt(int64(i), 10)
  s2 := strconv.Itoa(i)
  fmt.Printf("%v, %v\n", s1, s2)
}

As you can see, the results are exactly the same. The expected output from the above code is as follows

10, 10