How to save values with loop

Question

Hey guys, I am trying to add the returned value from the test() function into a the variable result, but += does not seem to work. I get the error "invalid variable initialization". I also tried replacing i++ to i+= which didnt work either. Maybe I'm totally wrong and should use a while loop instead? I'm quite lost..

I want 'result' to look something like this:

var result = no no no 0no 0no no;

etc (with no whitespace ofc).

Any help much appreciated! Thanks

function test(no){

         if (no <= 15){          
             return '0' + parseInt(no);
         }

         else {       
          return parseInt(no); 
         }     
}


     for(i = 0; i < pics.length; i++){

      var b = pics[i].value;

      var result += test(b);

     }

Answer 1

Every time your loop starts, var result goes away. You need to move it outside the loop:

var result = ''; // lives outside loop
for(i = 0; i < pics.length; i++)
{
    var b = pics[i].value;
    result += test(b);
}

Answer 2

you need to initialize result as a string not as a var.

e.g.

outside the loop

string result = string.Empty;

for loop

result += test(b);

end for loop

Answer 3

You are seeing that error because you are using the increment operator on a newly declared variable. Use '=':

for(i = 0; i < pics.length; i++)
{
   var b = pics[i].value;
   var result = test(b);
}

Although, as GMain pointed out, the real solution is to move the 'result' variable declaration outside of the for loop.