The “join” method in JavaScript is used on Arrays irrespective of the datatype of each element of the array. Just like the name of the method suggests, the array’s elements will be joined together. The result of the join is a string with a comma(,) as the separator for the elements by default. For example;

var electronics = ["television", "computer", "printer"]

When Array.join() is called on our array as shown below;

electronics.join();

we get;

"television,computer,printer"

Another way of using the join method is by giving it a separator. In this case, the elements will be joined using the separator given…