Help please i cannot understand it

Tell us what’s happening:
I AM HAVING A HARD TIME UNDERSTANDING WHAT THE COURSE WANTS ME TO DO AND HOW CAN I DO IT… AND WHY I AM DOING IT… THE LOGIC BEHIND THE ANS CODE ???

THANKS A LOT FOR ANSWERING.

  **Your code so far**

function nextInLine(arr, item) {
// Only change code below this line

return item;
// Only change code above this line
arr.push(item);


}

// Setup
var testArr = [1,2,3,4,5];

// Display code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6));
console.log("After: " + JSON.stringify(testArr));
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0

Challenge: Stand in Line

Link to the challenge:

There are three requirements for the function:

  1. Add the number to the end of the array
  2. remove the first element of the array
  3. return the element that was removed

Which of these are you having trouble understanding?

My suggestion would be to tackle them one at a time. Click the “Reset All Code” button to get a fresh start on the lesson. Only add/change between the comments.

Hint: The return statement will be the last line in the function and you will need to modify it.

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