To invoke an external or ESL subroutine, use the call action statement. In the call statement, you specify the name of the variables you want to pass as arguments to the subroutine. For example:

call MIN(MyNumbers, TheMin)

where MyNumbers is a floating point array name containing the numbers to be compared. The minimum value is returned in the floating point variable TheMin. The parameter variables used in the call statement must be the same number and type as specified in the declaration statement.