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.



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dim ar(10,10)
for i = 1 to 10
    for j = 1 to 10
        ar(i, j) = int(rnd(1) * 20) + 1
    next
next
 
flag=0
for x = 1 to 10
    for y = 1 to 10
        print ar(x,y)
        if ar(x,y) = 20 then
            flag=1
            exit for
        end if
    next
    if flag then exit for
next
print "Completed row ";x;" and column ";y