why this code doesn't return the right output for number greater than 9 ?

Question

const arr = [10, 11, 7, 5, 100, 6, 4, 3, 8, 9];

function num(e) {
for (let e of arr) {
if (e.toString().split('').includes('10')) {
return 'Yay num found';
}
}
return 'Num not found';
}

console.log(num(arr));
// the output will be Num not found
// and the output supposed to be yay num found and if i check num less than 10 I get the correct output!

Answer 1

Let us take the 1st element which is 10
e.toString().split('') returns ['1','0'] which doesn't have a '10'. So it will never become true. Hope you get the point.