# Example: Comments

In a single line such as:

If a>b Then c Else d ! if/then expression

only that part preceding the exclamation point is evaluated.

In several lines such as:

If a>b !Click this button to use a subset of the data contained in the data model.

!temp a greater than temp b

Then c ! shut valve

Else d ! do nothing

only those parts preceding the exclamation points are evaluated.

## See also

About expressions

Add comments to expressions