Add user input to javascript array

Question

I am brand new to coding. Im having issues adding input to the end of my array

function my_array_add(arr, value){
   arr.push (value);
}
console.log (my_array_add(arr, 9));

I just keep getting undefined. What am I missing/doing wrong?

You must return arr;. Functions without an explicit return always implicitly return undefined. — Aluan Haddad
– Aluan Haddad, Commented Jun 7, 2020 at 4:35
Return fixed it! Im still getting used to all of this. Thank you for your help! — guywhogames
– guywhogames, Commented Jun 7, 2020 at 4:45

mickl · Accepted Answer · 2020-06-07 04:33:17Z

1

You need to return a value from your function otherwise it will return undefined:

let arr = [];

function my_array_add(arr, value){
   arr.push (value);
   return arr;
}
console.log (my_array_add(arr, 9));

answered Jun 7, 2020 at 4:33

mickl

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HW Siew · Accepted Answer · 2020-06-07 04:41:46Z

0

If you just want to add an input to the end of an array, you can simplify the operation without writing an extra function. .push is the function you need to accomplish the desired outcome.

let arr = []; // first initialize an empty array

arr.push(input_1); // assume input_1 = 1, it can be anything in general
arr.push(input_2); // assume input_2 = 2

console.log(array); // output : [1,2]

answered Jun 7, 2020 at 4:41

HW Siew

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