singly-linked list
See also

 Array
 Associative array: Creation, Iteration
 Collections
 Compound data type
 Doubly-linked list: Definition, Element definition, Element insertion, List Traversal, Element Removal
 Linked list
 Queue: Definition, Usage
 Set
 Singly-linked list: Element definition, Element insertion, List Traversal, Element Removal
 Stack
 
class Node
{
  const Int value  // keep value fixed
  Node? successor  // allow successor to change, also, can be 'null', for end of list
 
  new make (Int value, Node? successor := null)
  {
    this.value = value
    this.successor = successor
  }
}
 