if

Used to denote a condition.

Example: If it rains, I will get wet.

although

Example: He was a great friend, if a little strange.

When... occurs (a programming statement).

Example: If A, then B, else C.

If is used to report questions and things that are unknown.

Example: She asked if they had arrived yet.

If is a conditional situation.

Example: There are many ifs we need to consider before we start on the plan.