javascript 推送到阵列

Posted 2021-05-03

// Creating an empty array for our favorite TV shows.
var favTVshows = [];
var tvShow;

// For-Loop that will repeat three times.
for (var i = 1; i < 4; i++) {

  // Each time it asks the user for their #1, #2, or #3 TV show.
  tvShow = prompt("What's your #" + i + " favorite TV show?");

  // It then takes the user's response and "pushes" (or adds) the variable to the end of the favTVshows array.
  favTVshows.push(tvShow);
}


// We then loop through the favTVshows array...
for (var j = 0; j < favTVshows.length; j++) {

  // ...and create alert messages listing out each show in our array.
  alert(favTVshows[j]);
}

var animals = ['pigs', 'goats', 'sheep'];

console.log(animals.push('cows'));
// expected output: 4

console.log(animals);
// expected output: Array ["pigs", "goats", "sheep", "cows"]

animals.push('chickens');

console.log(animals);
// expected output: Array ["pigs", "goats", "sheep", "cows", "chickens"]