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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Refactor Using a Loop

Devin Scheu
Devin Scheu
66,191 Points
Posted by Devin Scheu
Devin Scheu
66,191 Points

Why is this code not working? (JS)

Question: The code below logs all of the even numbers from 2 to 24 to the JavaScript console. However, there's a lot of redundant code here. Re-write this using a loop.

Code:

script.js 
var counter = 0;

while (counter > 25) {
  counter += 2;
  console.log(counter);
}
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

1 Answer

lihaoquan
lihaoquan
12,045 Points
lihaoquan
lihaoquan
12,045 Points

Correct code :

var counter = 0;

while (counter < 24) { counter += 2; console.log(counter); }

Your code :

var counter = 0;

while (counter > 25) { counter += 2; console.log(counter); }

Problem #1 :

counter > 25 Will give false as at the start, you set var counter = 0, 0 can never be greater ( > ) than 25, thus, the while loop will not be executed as the condition is false ( taken from 0 > 25 ).

Devin Scheu
Devin Scheu
66,191 Points
Devin Scheu
Devin Scheu
66,191 Points

Yup, what a simple mistake thanks for the help :D.