Why would this not work?: NumberStack stack2 = new NumberStack(5); public void PrintStack()   {     //Loop through each element of the stack and display it     for (int i = size - 1 ; i >= 0; i--)     {       Console.WriteLine(stack[i]);     }   } Console.WriteLine(stack2.PrintStack()); -> provides an error "error CS1503: Argument `#1' cannot convert `void' expression to type `bool'"

What are the operations that can be performed on a stack?

Java data struc

0:00 I ZVV 58 Stack s - new Stack(); s. push(10); s. push(20); s. push(30); s. push(40); // stack created with elements- 10 20 30 40 59 60 61 62 63 64 65 sum(s); 66 public static void sum(stack s){ Integer sum = 0; stack tmp = new Stack(); // move the stack to new stack, it will be in reverse orde // simultaneously sum the elements while (Is.isEmpty())( tmp.push(s.pop(); sum t tmp.peek(); 67 68 69 70 71 72 73 74 sum t= tmp.peek (); 74 75 // move to original stack while (Itmp.isEmpty()){ s.push(tmp.pop()); system.out.println("sum= "+sum.tostring()); OUTPUT- 10 pushed into stack 20 pushed into stack 30 pushed into stack 40 pushed into stack 40 pushed into stack 30 pushed into stack 20 pushed into stack 10 pushed into stack 10 pushed into stack 20 pushed into stack 30 pushed into stack 40 pushed into stack Sum= 100 Sum of 10, 2O, 30, 40 = 100 I hope it helps. For any doubt, feel free to ask in comments, and give upvote if u get the answer.