Implication without if statement In logic, can we have an implication if there is no "if"?
Ex, John shall do $x$ regardless
Then is this an implication?

The word "regardless" in your example doesn't modify the meaning of the sentence. Its job is merely to explicitly point out that there is no implication or condition present.
It is up to the reader/listener to figure out from context which potential implication it is he should note isn't there.
In mathematics, where our ideal is that all conditions are stated explicitly, we have no need for representing such things in symbolic logic. Then, conditions are never just assumed to be there if they're not actually written down, so a symbolic form of "observe that there is no condition here" is not necessary. Of course, we can still ask the reader to think about a particular property of a formula, but we use words for that, not symbols.
