JavaScript Reference
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Quick Reference

The Array push() method adds new items to the end of an array, changing the length of the array.

<!-- html element to place output -->
<p id='my_cars'></p>
// array
let cars = ['Lamborghini', 'Ferrari'];

// add new items to the end of the array
cars.push('Maserati', 'Alfa Romeo');

// output changed array info to HTML element
document.getElementById('my_cars').innerHTML = cars;

Note

Arrays count starting from zero NOT one. So item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on.

Output

Lamborghini,Ferrari,Maserati,Alfa Romeo

Syntax

array.push(item1, item2, ...)

JavaScript Notes:

  • When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • JavaScript is a case-sensitive language; firstName is NOT the same as firstname
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
  • JavaScript variables must begin with a letter, $, or _
  • JavaScript variables are case sensitive (x is not the same as X)
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