custom JS code to search through an array

search-arr.js

let colors = ["red", "green", "blue", "yellow"];

let favColor = "pink";

(function check() {
  let output = 0;
  for(color in colors) {
  // console.log(colors[color]);
  if(colors[color] == favColor) {
    output = "I found your favorite color, color " + colors[color];
    break;
  }
}
  isNaN(output) ? console.log(output) : console.log("Unknown currency");
}());