I am doing an application it says:

Have you held any leadership type positions? Yes/No

Please describe (100 words or less)

I did not have any leadership type positions, so no.

My question is, do I have to explain why I did not have any leadership or is it only if I say yes?

I think you should explain why you said no.

I agree with Ms. Sue.

In addition, you should probably indicate what clubs and/or activities you have participated in ... and how. Perhaps you were active in a group that has done lots of community service. Even if you have not been an officer, your actions may have influenced others to join in on the service activities. That also is a type of leadership.

In this specific case, you are asked to describe any leadership type positions you have held, if any, within 100 words or less. Since you did not have any leadership type positions, your answer would simply be "No."

Generally, if a question asks you to describe a specific experience or qualification, it is usually necessary to provide an explanation. However, in this particular question, it appears that they are only interested in hearing about your leadership positions if you have had any. Therefore, in this case, it is not necessary to explain why you did not have any leadership type positions.