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Question

i am trying to learn some new stuff with GoLang, and got a litlebit stuck, probaly the reason is just that i am not very good at using arrays.

So heres what i want to do:

1. Make variable.
2. Download with that variable.
3. Add ++1 for that variable
4. Download with added 1

and loop it lets say 10 times.

I am all good with points 1 and two, but little stuck with 3 & 4. :).

all the files come in .pdf, thats why i made that strconv there.

I probaly should make somekind of Loop in main, and call DownloadFile function with some array parameters in there?

package main

import (
    "fmt"
    "io"
    "net/http"
    "os"
    "strconv"
)

func main() {
    url_id := strconv.Itoa(23430815+2)
    filename := url_id+".pdf"
    fileUrl := "https://someurLid="+url_id

    if err := DownloadFile(filename, fileUrl); err != nil {
        panic(err)
    }
    fmt.Println(fileUrl)
}


func DownloadFile(filepath string, url string) error {

    resp, err := http.Get(url)
    if err != nil {
        return err
    }
    defer resp.Body.Close()

    out, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer out.Close()

    _, err = io.Copy(out, resp.Body)
    return err
}

Answer 1

Cerise Limón gave the answer and thats thats how it worked out.

    arr := make([]uint8, 3) //How many times it loops
url_id := 23430815 //Starting from id, filename
for range arr {
    filename := strconv.Itoa(url_id)+".pdf"
    fileUrl := "https://someurl?id="+strconv.Itoa(url_id)

    if err := DownloadFile(filename, fileUrl); err != nil {
        panic(err)
    }
    fmt.Println(fileUrl)
    url_id++
}

Thank you for pointing out where i should start! :).