Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Create a for Loop

Martin Bornman
PLUS
Martin Bornman
Courses Plus Student 12,662 Points
Posted by Martin Bornman
Martin Bornman
Courses Plus Student 12,662 Points

for loop

Seems the loops is my downfall.What is wrong with this code?

script.js 
i = 4;
for ( i = 4; i < 156; i +=) {
  console.log(i);
}

2 Answers

Maximillian Fox
PLUS
Maximillian Fox
Courses Plus Student 9,236 Points
Maximillian Fox
Maximillian Fox
Courses Plus Student 9,236 Points

Hey there,

Your variable i is missing the var keyword. You need to use

var i = 4;

to declare it.

Also at the end of your for loop statements, I can see 

i +=

but there is no number specifying how much the i variable should increment. So you need to use

i += 1

Also, you can declare your i variable inside the for loop directly, so putting the above examples together should give you

for ( var i = 4; i < 156; i += 1 ){
  console.log(i);
}

Give it a try and remember to always check your console for errors :)

Gianmarco Mazzoran
Gianmarco Mazzoran
22,076 Points
Gianmarco Mazzoran
Gianmarco Mazzoran
22,076 Points

Ops! didn't notice the var keyword! Good job!

Gianmarco Mazzoran
Gianmarco Mazzoran
22,076 Points
Gianmarco Mazzoran
Gianmarco Mazzoran
22,076 Points

Hi, you forgot to add an increment number:

script.js 
i = 4;
for ( i = 4; i < 156; i += 1) {
  console.log(i);
}