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JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Iterating through an Array

gregory gordon
seal-mask
.a{fill-rule:evenodd;}techdegree
gregory gordon
Full Stack JavaScript Techdegree Student 14,652 Points
Posted by gregory gordon
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gregory gordon
Full Stack JavaScript Techdegree Student 14,652 Points

Use a for or while loop to iterate through the values in the temperatures array from the first item -- 100 -- to the las

not understanding why i can list them in order.

script.js 
var temperatures = [100,90,99,80,70,65,30,10];

function temperatures( list ) {
  var listHTML = '<ol>';
  for (var i = 0; i < list.length; i += 1) {
    listHTML += '<li>' + list[i] + '</li>';
  }
 console.log(temperatures)
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

2 Answers

Eric Trego
Eric Trego
15,308 Points

You both are making way more code then needed.

\\\\\\\\\\\\\\\\\\\\\\\\

var temperatures = [100,90,99,80,70,65,30,10];

for (var i= 0; i< temperatures.length; i+= 1) {

console.log(temperatures[i]); }

\\\\\\\\\\\\\\\\\\\\\\

Gilbert Kennen
Gilbert Kennen
10,661 Points
Gilbert Kennen
Gilbert Kennen
10,661 Points

There are a few errors in this code: Both the variable holding the list of temperatures and <ol> generating function have the same name. This makes it so you can't pass the list of temperatures into the function later.

The function declaration isn't closed with a }, so the console.log method is never called as it is still inside the function declaration.

The <ol> generating function never appends a </ol> to listHTML.

The listHTML variable is never returned from the function, so it won't work as it seems you intend with console.log.

In console.log(temperatures), I am uncertain what you are attempting to do here, but I presume you want the output of the function which you named temperatures, but the function isn't called with (temperatures).

In the corrected code below I also change console.log to document.write because this is an awful string to actually read in the log.

var temperatures = [100,90,99,80,70,65,30,10];

function logTemperatures( list ) {
  var listHTML = '<ol>';
  for (var i = 0; i < list.length; i += 1) {
    listHTML += '<li>' + list[i] + '</li>';
  }
  listHTML += '</ol>';
  return listHTML;
}
document.write(logTemperatures(temperatures));