TypeScript | Array join() Method

The Array.join() is an inbuilt TypeScript function which is used to joins all the elements of an array into a string. 
Syntax:

array.join(separator)

Parameter: This method accept a single parameter as mentioned above and described below:

• separator : This parameter is the a string to separate each element of the array.

Return Value: This method returns the string after joining all the array elements. 
Below examples illustrate the Array join() method in TypeScript.

Example 1:

JavaScript

<script>
    // Driver code
    var arr = [ 11, 89, 23, 7, 98 ];

    // use of join() method
    var str = arr.join(", ")

    // printing element
    console.log("String : " + str);
</script>

Output:

String : 11, 89, 23, 7, 98

Example 2:

JavaScript

<script>
    // Driver code
    var arr = [ 'a','b','c','a','e' ];

    // use of join() method
    var val = arr.join(" ")
    var val1 = arr.join(" + ")

    // printing element
    console.log(val);
    console.log(val1);
</script>

Output:

a b c a e
a + b + c + a + e