FOR x ← 1 TO 10 FOR y ← 1 TO 10 result ← y * x OUTPUT y + " * " + x + " = " + result ENDFOR ENDFOR For every iteration of x, y is iterated ten times. Nested iteration isn't limited to FOR loops.

So I'm not a programmer, I took a few classes ages ago, but there are some Python scripts in use ... then store it in a nested dictionary, as I iterate through a list of strings.