Cfrgtkky

I want to create a function that accepts an array and returns the last item in the array.

let test=["hichem","amine", 2 , 5];



function getLastItem(arr) {



    if (arr.isArray ===true) {



         return console.log(arr[arr.lenghth-1]);



    }



    return console.log("The entered data is not an Array");



}



getLastItem(test);

I write this code and I get this message in the console:

Failed to load resource: net::ERR_FILE_NOT_FOUND

instead of the result

Try this

function getLastItem() {

  var arr=["hichem","amine", 2 , 5];

  if (arr instanceof Array){

     return arr[arr.length-1];

  }

}

If I understand your question correctly, you want to return the last item if it's an array or give a console log statement if it's not.

You have used the wrong syntax.
It is Array.isArray(arr).

let test=["hichem","amine", 2 , 5];



function getLastItem(arr) {

 if (Array.isArray(arr)) {

  return (arr[arr.length-1]);

 }

 return "The entered data is not an Array";

}



console.log(getLastItem(test));

All is good in your function but "arr.isArray ===true" this line is not working. it should be something like below code. But i don't know why you are returning console.log from a function. but if you want forcefully there is nothing wrong just modify your code.

let test=["hichem","amine", 2 , 5];

    function getLastItem(arr) {

        var isArray=(arr instanceof Array); //or test.constructor === Array

        if (isArray) {

             return (arr[arr.length-1]);

        }

   return console.log("The entered data is not an Array");

}

getLastItem(test);

• arr.isArray is undefine, you can coding like this:

let test=["hichem","amine", 2 , 5];



function getLastItem(arr) {



    if (arr instanceof Array) {



         return console.log(arr[arr.lenghth-1]);



    }



    return console.log("The entered data is not an Array");



}



getLastItem(test);