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CList programming Language
Clist is an interpreted language which is used to execute a series of TSO commands and sub-commands to save time and effort. Clists are program that reside in either sequential and partitioned data set. The sequential Clist contains the commands in the proper listing and execute in the sequence but in the partitioned data set it may contain one or more Clist's. Clist have the many features like other programming languages Error handling, perform I/O, define and use symbolic variables, communicate with uses at terminal.
Two types of Clist's
- Simple Clist : A simple Clist is a basic Clist which contain the sequence of TSO commands and sub-commands.
- Programmable Clist : A programable Clist cotains Clist statements in addition to the TSO commands and subcommands
CList program example
{`
PROC 1 LANGUAGE
IF &LANGUAGE = SPANISH THEN +
WRITE HOLA, MUNDO
ELSE IF &LANGUAGE = FRENCH THEN +
WRITE BONJOUR, MONDE
ELSE +
WRITE HELLO, WORLD
EXIT
`}
Some Common Clist Commands
| S.NO | Clist command | Description |
| 1 | &DATATYPE | &DATATYPE is used to determine the data type of an expression |
| 2 | &EVAL | &EVAL forces numeric evaluation of the expression that is passed to the function |
| 3 | &NRSTR | The &NRSTR function defines a non-rescannable stringn |
| 4 | &SYSABNCD | The &SYSABNCD variable provides the abend code received from a TSO command invoked via the TSOEXEC TSO command |
| 5 | &SYSLTERM | The &SYSLTERM variable supplies the number of lines (rows) available on the TSO terminal screen |
| 6 | &SYSTSOE | The &SYSTSOE variable is used to determine the release level of TSO/ |
