for y in 1...10 for x in 1...(y+1) printf("%d * %d = %-2d ", x, y, x*y) end printf("\n") end i = 1 while i <= 9 j = 1 while j <= i mul = j * i printf("%d x %d = %-2d ", j, i, mul) j = j + 1 end i = i + 1 printf("\n") end