Reduce is a function or method that is used to take the values in an array or a list and apply a function to successive members of the list to produce (or reduce them to), a single value.



Task

Show how reduce (or foldl or foldr etc), work (or would be implemented) in your language.



See also

 Wikipedia article:   Fold
 Wikipedia article:   Catamorphism


var nums = Enumerable.Range(1, 10);
 
int summation = nums.Aggregate((a, b) => a + b);
 
int product = nums.Aggregate((a, b) => a * b);
 
string concatenation = nums.Aggregate(String.Empty, (a, b) => a.ToString() + b.ToString());
 
Console.WriteLine("{0} {1} {2}", summation, product, concatenation);