how to convert int to int64 in golang?

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To convert int to int64 in golang, use theint64() method it will return int as a int64. You have to just call it like int64(v).

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

Follow the below tutorial if you are struggling with installing GO in windows.

https://aguidehub.com/blog/how-to-install-golang-in-windows/

Today, I will show you how do I convert int to int64 in golang, as mentioned above I’m going to use the Itint64oa() method which is provided by the golang.

Let’s start our Golang convert int to int64 example

main.go

package main

import (
    "fmt"
    "reflect"
)

func main() {
    var n int = 97
    m := int64(n)
    fmt.Println(m)
    fmt.Println(reflect.TypeOf(m))
}

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

Output

97
int64

I hope it helps you, All the best 👍.

Try it Yourself