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TypeScript | Array reduceRight() Method
  • Last Updated : 18 Jun, 2020

The Array.reduceRight() is an inbuilt TypeScript function which is used to apply a function against two values of the array as to reduce it to a single value in a right to left manner. 
Syntax:

array.reduceRight(callback[, initialValue])

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

  • callback : This parameter is the Function to execute on each value in the array.
  • initialValue : This parameter is the Object to use as the first argument to the first call of the callback.

Return Value: This method returns the reduced right single value of the array. 
Below examples illustrate the Array reduceRight() method in TypeScript

Example 1: 

JavaScript






<script>
    // Driver code
    var arr = [ 11, 89, 23, 7, 98 ]; 
  
    // use of reduceRight() method 
    var val = arr.reduceRight(function(a, b)
    
        return a - b; 
    });
       
    // printing element
    console.log( val );
</script>

Output: 

-32

Example 2: 

JavaScript




<script>
    // Driver code
    var arr = [2, 5, 6, 3, 8, 9]; 
    var val;
   
    // use of reduceRight() method 
    val = arr.reduceRight(function(a, b)
    
        return a/b; 
    });
       
    // printing element
    console.log( val );
</script>

Output: 

0.00625




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