Adding Array Elements

The easiest way to add a new element to an array is using the push() method:

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.push("Lemon"); // adds a new element (Lemon) to fruits

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New element can also be added to an array using the length property:

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits[fruits.length] = "Lemon"; // adds a new element (Lemon) to fruits

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Adding elements with high indexes can create undefined "holes" in an array:

var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits[6] = "Lemon"; // adds a new element (Lemon) to fruits

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