How to convert int64 to binary and keep leading zeros in golang?

Question

I have created a program which converts int64 to binary:

package main

import (
    "fmt"
    "strconv"
)

func main() {
    n := int64(3)
    fmt.Println(strconv.FormatInt(n, 2))
}

And it returns this value:

How can I keep the leading zeros in the answer?

Thanks in advance!

Possible duplicate of [Golang: How to pad a number with zeros when printing?](http://stackoverflow.com/questions/25637440/golang-how-to-pad-a-number-with-zeros-when-printing) — coredump, Jul 17 '16 at 16:20

score 8 · Accepted Answer · answered Jul 17 '16 at 16:34

8

You can format directly as binary with padding:

fmt.Printf("%064b\n", n)

answered Jul 17 '16 at 16:34

coredump

score 0 · Answer 2 · answered Jul 17 '16 at 16:26

0

You can try this:

func main() {
    n := int64(3)
    s := strconv.FormatInt(n, 2)
    fmt.Printf("%064s", s)
}

answered Jul 17 '16 at 16:26

abhink

2 Answers2