join() – Join Elements of Array

array.join(separator)

• array is an array of elements
• join is the array method name
• separator is an optional string value. default value is comma

join() method joins the elements of the array with the given separator string, and returns the result as a string. join() method does not modify the original array

Examples

1. join the elements of the array fruits with '-' hyphen character as separator

let fruits = ['apple', 'banana', 'cherry'];
let separator = '-';
output = fruits.join(separator);
console.log(output);

2. call join() method on fruits array with no separator passed

let fruits = ['apple', 'banana', 'cherry'];
let output = fruits.join();
console.log(output);

since comma is the default separator, we get a comma separated elements in the resulting string