Statements               Pascal Program Instructions

    A statement is an instruction in a Pascal program (or subprogram).
    There are six basic types of statements in Pascal:

         <null>         does nothing
         <assignment>   assigns a value to a variable (or function name)
         <invocation>   calls a procedure
         <conditional>  executes a statement based on some condition
         <iterative>    executes some statement repeatedly
         <compound>     a group of statements treated as a single
    statement

    A statement is translated by the compiler into machine instructions,
    while a declaration sets aside memory to hold data.