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

Posted by Greta Regondi
Greta Regondi
6,166 Points

Re-write code using a loop.

Can you help me?

2 Answers

Justin Horner
STAFF
Justin Horner
Treehouse Guest Teacher
Justin Horner
Justin Horner
Treehouse Guest Teacher

Hello Greta,

The code challenge is asking for you to remove the redundant calls to console.log and instead use a loop to accomplish the same result. You can start with a for loop like this.

for(var i = 2; i < 25; ++i) {

}

In this case we want only want to log the even numbers. For that, we can use the modulus operator to find out of the variable "i" holds a value that is even.

if(i % 2 == 0) {
    console.log(i); 
}

If you put these together, you'll have this.

for(var i = 2; i < 25; ++i) {
    if(i % 2 == 0) {
        console.log(i); 
    }
}

I hope this helps.

Victor Warner
Victor Warner
2,869 Points

I like this answer than you

elk6
elk6
22,916 Points
elk6
elk6
22,916 Points

Hi Greta,

Try using a for loop to console.log the numbers:

for (num = 2; num < 25; num = num + 2) { 
    console.log(num);
}

This loop makes a new var called num with the value 2, it checks if the value is still under 25 and, if so, executes the loope and add 2 to the num var. Meanwhile it logs the value of num to the console. Since we gave it a +2 it will log every other second number.