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Different ways for Integer to String Conversions

Like most modern languages, Golang includes Integer as a built-in type. Let's take an example, you may have a variable that contains a Integer value and you want to convert it into String. In order to convert Integer value into String type in Golang, you can use the following methods.
FormatInt() Method
You can use the strconv package's FormatInt() function to convert the int into an string value. 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.

Syntax

func FormatInt(i int64, base int) string

Example

package main

import (
	"fmt"
	"reflect"
	"strconv"
)

func main() {
	var i int64 = 125
	fmt.Println(reflect.TypeOf(i))
	fmt.Println(i)

	var s string = strconv.FormatInt(i, 10)
	fmt.Println(reflect.TypeOf(s))
	
	fmt.Println("Base 10 value of s:", s)
	
	s = strconv.FormatInt(i, 8)
	fmt.Println("Base 8 value of s:", s)
	
	s = strconv.FormatInt(i, 16)	
	fmt.Println("Base 16 value of s:", s)
	
	s = strconv.FormatInt(i, 32)	
	fmt.Println("Base 32 value of s:", s)
}

Output

int64
125
string
Base 10 value of s: 125
Base 8 value of s: 175
Base 16 value of s: 7d
Base 32 value of s: 3t
fmt.Sprintf() Method
Sprintf formats according to a format specifier and returns the resulting string. Here, a is of Interface type hence you can use this method to convert any type to string.

Syntax

func Sprintf(format string, a ...interface{}) string

Example

package main

import (
	"fmt"
	"reflect"
)

func main() {
	b := 1225
	fmt.Println(reflect.TypeOf(b))

	s := fmt.Sprintf("%v", b)
	fmt.Println(s)
	fmt.Println(reflect.TypeOf(s))
}

Output

int
1225
string
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