Exceptions are the utilities Show, Write, and Print ...
from: https://www.jmp.com/support/help/en/18.1/?os=win&source=application#page/jmp/advanced-expressions-macros-and-lists.shtml# If you assign the expression x+y to a, quoting it as an expression with Expr, then whenever a is evaluated, it evaluates the expression using the current values of x and y and returns the result.
Exceptions are the utilities Show, Write, and Print, which do not evaluate e...