For Loop Range with Smaller Number on Right Simple question from an algorithm noob...

If $i=1$ then the inner loop will include what I believe to be an invalid range. Is this acceptable pseudocode? 

For i=1 to n
  For k=1 to i-1
    ...
It is acceptable.

The loop says “do something for each integer $k$ in some range”. If there is no integer in that range, the loop just won’t do anything.