Show a nested loop which searches a two-dimensional array filled with random numbers uniformly distributed over 



[
1
,
…
,
20
]


{\displaystyle [1,\ldots ,20]}

.

The loops iterate rows and columns of the array printing the elements until the value 



20


{\displaystyle 20}

 is met.

Specifically, this task also shows how to break out of nested loops.



Related tasks

   Loop over multiple arrays simultaneously
   Loops/Break
   Loops/Continue
   Loops/Do-while
   Loops/Downward for
   Loops/For
   Loops/For with a specified step
   Loops/Foreach
   Loops/Increment loop index within loop body
   Loops/Infinite
   Loops/N plus one half
   Loops/Nested
   Loops/While
   Loops/with multiple ranges
   Loops/Wrong ranges


program LoopNested;
uses SysUtils;
const Ni=10; Nj=20;
var
  tab: array[1..Ni,1..Nj] of Integer;
  i, j: Integer;
label loopend;
begin
  for i := 1 to Ni do
    for j := 1 to Nj do
      tab[i,j]:=random(20)+1;
  for i := 1 to Ni do
  begin
    for j := 1 to Nj do
    begin
      WriteLn(tab[i,j]);
      if tab[i,j]=20 then goto loopend
    end
  end;
loopend:
end.