The expression which represents the given conditional statement in shorthand is: S → W.
<h3>What is a conditional statement?</h3>
A conditional statement can be defined as a statement that can be written to contain both a hypothesis and conclusion. Thus, it typically has the form "if P then Q."
<u>Where:</u>
P and Q represent sentences.
If Megan is swimming = S
It is warm outside = W
Therefore, if Megan is swimming, then it is warm outside is represented by S → W.