JAVASCRIPT HELP STEP STEP

Question

I’ve just started to mess with js, and I’m doubtful about a code I’m learning from and I don’t know why I’m missing, who can help me I’m grateful.

function passoAPasso(){
  for (var i = 0; i < 5; i++){
    console.log(i);
  }
}

passoAPasso();

Answer 1

EDIT: the problem after all was why was calling the function passoApasso(), it was only necessary to write the function, the program itself called the function, so it appeared repeated the numbers. The code below only serve if you want to print 01234, without the \n, I’ll let him down, but is not the answer to the question!

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ANCIENT ANSWER

The problem is that you are printing with the console.log normally, then she does the line break:

0
1
2
3
4

Instead of printing out 01234 as the exercise asks, to solve this just concatenate the numbers with a string:

function passoAPasso(){
  let concat = "";
  
  for (var i = 0; i < 5; i++){
    concat = concat + (i + ""); // os números são convertido para string, porque você está somando ele com uma string, antes de concatenar
  }
  
  console.log(concat);
}

passoAPasso();

Explaining a little code: in the first iteration you have 1 + "", what generates "1", that is, now is a string and input you do concat + "1", Concat is an empty string, so the result is "1". In the second iteration, you have 2 + "", what generates "2", and then makes concat + "2", what generates "12" and so on.