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

Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points
Posted by Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points

Don't understand.....

I don't understand how to console.log numbers from 4 to 156.....

script.js 
var html='';
for ( var i = 4; i <= 157; i += 1 ) {
  html +=  i ;
  console.log(html);
}

3 Answers

Jake Lundberg
Jake Lundberg
13,965 Points
Jake Lundberg
Jake Lundberg
13,965 Points

Here is how I solved it: 

for(var i = 0; i < 157; i++) {
   console.log( i );
}
Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points
Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points

Thank you jake!

Still it seems not working... and i don't understand the i++... I got a lot to learn.

The error report is this:

You need to log out EVERY number from 4 to 156 to the console. Your loop calls the console.log() method 157 times, from 0 to 156.

Jake Lundberg
Jake Lundberg
13,965 Points
Jake Lundberg
Jake Lundberg
13,965 Points

oh haha, sorry, I mistyped my code: 

for(var i = 4; i < 157; i++) {
   console.log( i );
}

and i++ is another way of writing i += 1

Because incrementing by 1 is so common in programming, a shorthand was created, which is following a variable by two plus signs, as I did. This just adds one to the variable, the exact same way that i += 1 does.

Jake Lundberg
Jake Lundberg
13,965 Points
Jake Lundberg
Jake Lundberg
13,965 Points

You are very close.

In your code you are actually printing numbers 4 - 157 because you are using "greater than or equal to" instead of "greater than"

you would either need: 

i <= 156
or
1 < 157

also, unless you are being told to do otherwise, I would just use: console.log( i ).

Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points
Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points

Ah yes! Thank you!

Still it does not work, cause i should print all the numbers between 4 and 156 and i don't understand how...

Cesare

Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points
Cesare Parmiggiani
Cesare Parmiggiani
8,017 Points

Thank yo Jake!

Now everything works, and I'm glad to even learn something new!

Thank's a lot!