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

Posted by Gena I
Gena I
540 Points

not sure what im doing wrong here

for (var i=2; i<=24; i*2); { console.log(i); } it should console.log from 2 to 24 2 4 6 etc

script.js 
for (var i=2; i<=24; i*2); {
  console.log(i);
}
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Loops</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

5 Answers

Krishna Pratap Chouhan
Krishna Pratap Chouhan
15,203 Points

what you are printing is:

console.log(2);
console.log(4);

console.log(8);

console.log(16);

console.log(32);

Spolier alert....

correct answer below

for (var i=2; i<=24; i=1+2) {
  console.log(i);
}
Gena I
Gena I
540 Points

why is it i= 1+2?

andren
andren
28,558 Points
andren
andren
28,558 Points

There are three issues:

  1. i*2 does not actually change the value of i. It just calculates what i * 2 would be and then does nothing with the result. If you wanted to multiply i by two you would use i *= 2.

  2. You should not actually be using multiplication. By multiplying i by two each time you will get a sequence like this: 2, 4, 8, 16. not 2, 4, 6, 8, 10, etc. You should be using addition instead which is done like this: i += 1

  3. You have a semicolon after the declaration of the loop, that should not be there. By placing it there you end the loop declaration prematurely.

If you fix those issues like this:

for (var i=2; i<=24; i+=2) { // Changed i*2 to i+=2 and removed semicolon
  console.log(i);
}

Then your code will pass.

Gena I
Gena I
540 Points
Gena I
Gena I
540 Points

i=i+2?

Gena I
Gena I
540 Points
Gena I
Gena I
540 Points

i did this for (var i=2; i<=24; i=i+2); { console.log(i); }

and i got it wrong and it said You logged 1 numbers to the console. You should log 12.

Gena I
Gena I
540 Points
Gena I
Gena I
540 Points

ok took out semicolon thanks

Krishna Pratap Chouhan
Krishna Pratap Chouhan
15,203 Points

my bad. good catch thanks.