Control processing within a CL procedure

You can use commands to change the flow of logic within your CL procedure.

• GOTO command and labels
  The GOTO command processes an unconditional branch.
• IF command
  The IF command is used to state a condition that, if true, specifies some statement or group of statements in the procedure to be run.
• ELSE command
  The ELSE command is a way of specifying alternative processing if the condition on the associated IF command is false.
• Embedded IF commands
  An IF command can be embedded in another IF command.
• DO command and DO groups
  The DO command allows you to process a group of commands together.
• DOUNTIL command
  The Do Until (DOUNTIL) command processes a group of CL commands one or more times.
• DOWHILE command
  The DOWHILE command lets you process a group of commands zero or more times while the value of a logical expression is true.
• DOFOR command
  The DOFOR command lets you process a group of commands a specified number of times.
• ITERATE command
  The Iterate (ITERATE) command can be used to skip the remaining commands in an active DOWHILE, DOUNTIL, or DOFOR group.
• LEAVE command
  The Leave (LEAVE) command can be used to exit an active DOWHILE, DOUNTIL, or DOFOR group.
• CALLSUBR command
  The Call Subroutine (CALLSUBR) command is used in a CL procedure for passing control to a subroutine defined within the same procedure.
• SELECT command and SELECT groups
  The Select (SELECT) command is used to identify one or more conditions and an associated group of commands to process when that condition is true.
• SUBR command and Subroutines
  The Subroutine (SUBR) command is used in a CL procedure, along with the End Subroutine (ENDSUBR) command, to delimit the group of commands that define a subroutine.
• *AND, *OR, and *NOT operators
  The logical operators *AND and *OR specify the relationship between operands in a logical expression. The logical operator *NOT is used to negate logical variables or constants.
• %ADDRESS built-in function
  The address built-in function (%ADDRESS or %ADDR) can be used to change or test the memory address stored in a CL pointer variable and can only be used within a CL procedure.
• %BINARY built-in function
  The binary built-in function (%BINARY or %BIN) interprets the contents of a specified CL character variable as a signed binary integer.
• %OFFSET built-in function
  The offset built-in function (%OFFSET or %OFS) can be used to store or change the offset portion of a CL pointer variable and can only be used within a CL procedure.
• %SUBSTRING built-in function
  The substring built-in function (%SUBSTRING or%SST) produces a character string that is a subset of an existing character string and can only be used within a CL procedure.
• %SWITCH built-in function
  The switch built-in function (%SWITCH) compares one or more of eight switches with the eight switch settings already established for the job and returns a logical value of '0' or '1'.
• Monitor Message (MONMSG) Command
  The Monitor Message (MONMSG) command is used to monitor for escape, notify, or status messages sent to the call stack of the procedure in which the Monitor Message (MONMSG) command is used.