What is array.toString() in Javascript?

The toString() method is used to convert an array to a string of comma-separated array values. In other words, the method returns a string that represents the specified array and its items or elements.

Syntax

array.toString()

Parameters

This method accepts no parameters.

Return value

toString() returns a string that represents the array elements. If the array is empty, then toString() returns an empty string.

Code

The example below shows how to use the toString() method on an array:

// create arrays

let array1 = [1, 2, 3, 4, 5];

let array2 = ["a", "b", "c", "d", "e"]

let array3 = ["Ruby", "Python", "Javascript", "Java"]

let array4 = ["", {name: "toString()"}, NaN, 0]



// call the toString() method

let A = array1.toString();

let B = array2.toString();

let C = array3.toString();

let D = array4.toString();



// print returned value to console

console.log(A);

console.log(B);

console.log(C);

console.log(D);

Note: An empty array will return nothing if toString() is called.

// create empty array
let emptyArray = []
// print the returned value of 
// emptyArray when toString() is called on it
console.log(emptyArray.toString()); // Empty string returned

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