I guess I don't understand this code challenge because I obviously outputted 4-154

Oh haha Ken you're awesome and have ninja vision, thanks.

Would you mind explaining why we use the num++ in our code? It wasn't discussed in the video and I don't understand the challenge answer as a result. Thanks in advance!

Micole Noddle, the num++ is the same as num = num + 1; It is an incrementer. It is being used in this code in order to increase the value of num each time the loop executes. That is why the output will count up. If num++ was not present, then the loop would only every output 4 or what ever value num is initially set to.

Additionally, if we did not increment the value of num, the condition num <= 156 would never be met. This would result in an infinite loop and it would crash the browser.

I hope that answers your question.

Micole;

A for loop allows one to iterate over a range of values. The basic syntax is:

for (initialization; termination;
     increment) {
    statement(s)
}

In this code example, num++ increments the variable num each time through the loop. The ++ is a postfix operator which passes the current value of num to the function and then increments it. It is a shorthand way of doing num = num + 1;

Happy coding,

Ken

Thank you Matthew and Ken!

var num=" " ; for(var i=4;i<=156; i++) { num += ' ' + i + ' ' ; } console.log(num); same issue here.i am able to print this in console 4to 156 .but its showing incorrect in in th course challenge.

Sir please help me.i am unable to move forward because of this.

Thanks Matt, I just had momentary dyslexia, and saw 154 and wrote 154 instead of 156. Thanks

Yeah, I have done that plenty of times on the challenges.

Challenges... sample code... project code... real life... All part of learning and being a developer, right? My family looks at me like I'm nuts when I can't see the difference between a 5 and an 8 in code.

Pleased it all worked out, peer code review can be very helpful.

Happy coding,

Ken

No I'm pretty sure, any syntax will work.

num ++; is the same as: num += 1; num = num + 1;

I just knew this from writing other programming languages.

You can use num += 1 as well, it will work the same...

Correct Juan ,thank you

Hey jodie, get rid of the semi-colon in your for loop control variable increment. like this: for ( var i = 4; i <= 156; i += 1)

Thanks a lot Justin. Those little one character errors are killing me, but I am learning from them.

To me, for loops are the most powerful because of the loop control variable. It holds the variable initialization, the comparison and the increment.

for ( variable initialization; comparison; increment;){}

That's a horrible outlook man, I literally have my career job today, because of Treehouse. No bullshit.

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

for (initialize; comparison; increment ) { /* output increment */ }