A value passed to a handler as part of a message or function call.

Any expressions after the first word in a message are evaluated to yield the parameters to a message handler. For example, in the message

myDisplay "Hello there world"

the value of "Hello there world" is the parameter passed to the myDisplay message handler.

Any expressions enclosed in the parentheses are evaluated to yield the parameters to a function handler. For example, in the function call

totalValue(thisCard.field(1).text)

the contents of the first field on the current card is the parameter passed to the totalValue function handler.

Multiple parameters are delimited by commas.