function test4(arr, k) {
let second = 1;
for(let i = 0; i < Infinity; i++) {
if (arr[i] == k || arr[i] > k) {
return second;
} else {
arr[i] += 1;
second++;
}
}
}
const arr = [2,1,5];
const k = 4;
console.log(test4(arr, k));
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