how to convert int64 to string in golang?

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To convert int64 to string in golang, just use the strconv.Itoa() method and pass your integer, it will convert int64 to string.

As we know Itoa() method accepts only int show first we have to convert int64 to int using the int() method.

Important Points

Difference between int and uint

UInt does not allow for negative numbers.

uint’s and int’s max value

uint8  : 0 to 255 
uint16 : 0 to 65535 
uint32 : 0 to 4294967295 
uint64 : 0 to 18446744073709551615 
int8   : -128 to 127 
int16  : -32768 to 32767 
int32  : -2147483648 to 2147483647 
int64  : -9223372036854775808 to 9223372036854775807

Today, I will show you how do I convert int64 to string in golang, as mentioned above I’m going to use the strconv.Itoa() way.

The strconv package provide strconv.Itoa() method.

Let’s start our Golang convert int64 to string example

Convert int64 to string example


package main

import (

func main() {
  var i int64 = 1844674407370955161
  fmt.Println(i, reflect.TypeOf(i))

  s := strconv.Itoa(int(i))
  fmt.Println(s, reflect.TypeOf(s))

In the above example, we have converted int64 to string and printed it in the golang console. let’s check the output.


1844674407370955161 int64
1844674407370955161 string

Try it Yourself

I hope it helps you, All the best 👍.

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