StringInsert

[senorita]

#include <File.au3>
#include <array.au3>
$path="file.txt"
$fileArray = Fileopen($path,1)
For $X = 1 to $fileArray[0]
    _StringInsert($path,"helloworld\",$fileArray[0])
Next
FileClose($path)

please help to debug the code

my file.txt contains

File.txt

-------------

peter

seoul

trinity

...

..

paster

I want like this

File.txt

----------------

helloworld\peter

helloworld\seoul

helloworld\trinity

....

..

helloworld\paster

So if any other method please quote here

and please help me with it

[AdmiralAlkex]

Sounds like you just want to concatenate the strings?

For $X = 1 to $fileArray[0]
    $fileArray[0] = "helloworld\" & $fileArray[0]
Next

Also you're using FileOpen() wrong, see helpfile. You may want to check _FileReadToArray() too.