Meaning

• An uncertainty, possibility, condition, doubt etc.

Meaning

• Supposing that, assuming that, in the circumstances that; used to introduce a condition or choice.

  "If it rains, I shall get wet."

• In the event that a statement is true (a programming statement that acts in a similar manner).

  "If A, then B, else C."

• Supposing that; used with past or past perfect subjunctive indicating that the condition is closed.

  "I would be unhappy if you had not talked with me yesterday."

• Supposing that; given that; supposing it is the case that.

  "If that's true, we had better get moving!"

• Although; used to introduce a concession.

  "He was a great friend, if a little stingy at the bar."

• (sometimes proscribed) Whether; used to introduce a noun clause, an indirect question, that functions as the direct object of certain verbs.

  "I don't know if I want to go or not."

• (usually hyperbolic) Even if; even in the circumstances that.

• Introducing a relevance conditional.

  "I have leftover cake if you want some."