Loops in Arrays.

Question

```JS/* INSTRUCTIONS
To run this file, click in the Console below and type: node 2_loop.js 
If the console isn't visible, click the View menu above and choose Show Console.
You can clear the console by typing clear and pressing enter.
If your program is stuck in an infinite loop, you can break out of the program by typing ctrl + C.
*/
/*Note: We've supplied you a basic function for generating a random number from 1 to 100 */
function random100() {
  return Math.floor(Math.random() * 100) + 1;
}
/* 1. Create a function named createRandomList that uses a for loop to create an array containing 10 random numbers from 1 to 100 (use the supplied function above to generate the numbers). The function should return that array. */
function createRandomList() {
  for (i = 0; i < 10; i++) {
    console.log(createRandomList[i]);
  }
}
/* 2. Call the createRandomList() function and store the results in a variable named myRandomList. */
function createRandomList() {
}
/* 3. Use a for loop to access each element in the loop. Each time through the loop log a message to the console that looks something like this:
Item 0 in the array is 48
When you're done you should have output 10 lines to the console -- one for each element. 
*/
// Run your code by typing node 2_loop.js in the console below```
CAN SOME ONE JOG MY MEMORY ON HOW TO USE A LOOP IN AN ARRAY?

Steven Parker · Accepted Answer

The loop itself is similar to the one you created to build the array.  But this time, you'll use the length of the array as the limiting condition.   You could also use "10" again, since you know that is the length of the array; but it's more generic and a good practice to use the actual length:
js
for (var i = 0; i < myArray.length; i++)

Then, inside the loop, you can use the loop variable as an index to the specific item: "myArray[i]".
Also, if you just hang on for 2 more videos, an example will be shown and explained in Array Iteration with a For Loop (https://teamtreehouse.com/library/array-iteration-with-a-for-loop).

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Conary Beckford

Conary Beckford

Loops in Arrays.

1 Answer

Steven Parker

Steven Parker

Conary Beckford

Conary Beckford

Steven Parker

Steven Parker