javascript array display code example

Example 1: javascript convert in a string the items of an array

const arr = [1, 2, 'a', '1a'];
const str = arr.toString();
console.log(str); //> "1,2,a,1a"

Example 2: how to read an array in javascript in HTML5

<body>
  <h1>Creating Arrays</h1>
  <h2>Regular:</h2>
  <script language="JavaScript">
    // Create the array.
    var Colors = new Array();
    // Fill the array with data.
    Colors[0] = "Blue";
    Colors[1] = "Green";
    Colors[2] = "Purple";
    // Display the content onscreen.
    document.write(Colors);
  </script>
  <h2>Condensed:</h2>
  <script language="JavaScript">
    // Create the array and fill it with data.
    var Colors = new Array("Blue", "Green", "Purple");
    // Display the content onscreen.
    document.write(Colors);
  </script>
  <h2>Literal:</h2>
  <script language="JavaScript">
    // Create the array and fill it with data.
    var Colors = ["Blue", "Green", "Purple"];
    // Display the content onscreen.
    document.write(Colors);
  </script>
</body>

Example 3: js arrays

// Making an array:
const colors = ["red", "orange", "yellow"];

// Arrays are indexed like strings:
colors[0]; // "red"

// They have a length:
colors.length; //3

// Important array methods:
//push(value) - adds value to the END of an array
//pop() - removes and returns last value in array

//unshift(val) - adds value to START of an array
//shift() - removes and returns first element in an array

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