To convert an int to a string in Golang, you can use the “strconv.Itoa()”, “strconv.FormatInt()”, or “fmt.Sprintf()” functions.
Method 1: Using Itoa() function
The main way to convert an int to a string is to use the “strconv.Itoa()” function. The “strconv.Itoa()” is a built-in function that returns the string representation of input when integer base 10 value.
Syntax
func Itoa(i int) string
Example
package main
import (
"fmt"
"strconv"
)
func main() {
data := 21
s := strconv.Itoa(data)
fmt.Printf("%T, %v\n", s, s)
}
Output
string, 21
The strconv package implements conversions to and from basic data types string representations.
We converted an integer to a string using Itoa() function, which accepts an integer and returns the string.
Method 2: Using FormatInt() function
The FormatInt() is a built-in function of the strconv package that converts an integer value to a string in Golang. The function returns the string representation of i in the given base for 2 <= base <= 36. The result uses the lowercase letters ‘a’ to ‘z’ for digit values >= 10.
Syntax
func FormatInt(i int64, base int) string
Example
package main
import (
"fmt"
"strconv"
)
func main() {
data := int64(-19)
str10 := strconv.FormatInt(data, 10)
fmt.Printf("%T, %v\n", str10, str10)
str16 := strconv.FormatInt(data, 16)
fmt.Printf("%T, %v\n", str16, str16)
}
Output
string, -19
string, -13
In this example, we defined the int64 version of the integer variable and assigned a -19 value to the data variable.
Then we tried to convert an integer to a string using the FormatInt() function with the base of 10 and 16.
Method 3: Using Sprintf() function
The fmt.Sprintf() is a built-in Golang function that formats based on the specifier. The Sprintf() method accepts the format and string and returns the formatted string.
Syntax
func Sprintf(format string, a ...interface{}) string
Example
package main
import (
"fmt"
"io"
"os"
)
func main() {
data := 19
str := fmt.Sprintf("%v \n", data)
io.WriteString(os.Stdout, str)
}
Output
19
In this example, we format an integer to a string using fmt.Sprintf() function and then use the io.WriteString() function to write the contents of the stated string “str” to the writer “w“, which takes a slice of bytes.

Krunal Lathiya is a Software Engineer with over eight years of experience. He has developed a strong foundation in computer science principles and a passion for problem-solving. In addition, Krunal has excellent knowledge of Distributed and cloud computing and is an expert in Go Language.