How to get the int64 size of an image as a string?

Question

I have a image file stored in the resource folder.I am opening it and I am able to get its size but when I am printing it in string using string(size) it is showing special character(a square).I checked its type using reflect.Typeof(),it is giving int64.How to convert this to string and print the size as a string????

I am using the following code:

    imgFile,_ := os.Open("QrImgGA.png")
    fInfo, _ := imgFile.Stat()
    var size int64 = fInfo.Size()
    fmt.Println(string(size))//Prints the size correctl.Eg.,678899

But when I try to put it in json it shows some special character by doing the following:

    m:=make(map[string]string)
    m["bytes"]=string(size)
    js,_:=json.Marshal(m)
    fmt.Println(string(js))//Gives value as special character

Any suggestions?? or is there some another way of finding the size of an image???

Are you abe to create an example recreating your issue on play.golang.org ? — m90, Feb 01 '18 at 20:11
You're asking how to get the size, but then you say "I am able to get its size". Try creating a [mcve]. — JimB, Feb 01 '18 at 20:21

peterSO · Accepted Answer · 2018-02-01T21:11:24.843

Package strconv
import "strconv"
func FormatInt

func FormatInt(i int64, base int) string

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.

For example,

package main

import (
    "fmt"
    "strconv"
)

func main() {
    size := int64(678899)
    str := strconv.FormatInt(size, 10)
    fmt.Println(str)
}

Output:

How to get the int64 size of an image as a string?

1 Answers1