Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Language Reference Manual

Simple statements

The types of simple statements are keyword, assignment, and null.

A keyword statement is a statement that begins with a keyword. This keyword indicates the function of the statement. In the following example, READ and DECLARE are keywords.

  read file(In) into(Input);          /* keyword statement  */
  %declare Text char;                 /* keyword %statement  */

The assignment statement contains one or more identifiers on the left side of the assignment symbol (=) and an expression on the right. It does not begin with a keyword:

  A = B + C;                          /*   assignment statement  */
  %Size = 15;                         /* % assignment statement   */

The null statement consists of only a semicolon and is a nonoperational statement.

        ;                             /* null statement         */
  Label:;                             /* labeled null statement */
    % ;                               /* % null statement     */

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