TypeScript | Array join() Method

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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>