Differences

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--- openvms:openvms-cheatsheet [2023/07/01 07:45] – dodger
+++ openvms:openvms-cheatsheet [2023/07/01 07:54] – dodger
@@ Line 36: / Line 36: @@
 | ''-F-'' | ''4'' | SEVERE |
+====== Programming ======
+More or less
 ===== Symbols (Variables)  =====
 ^ Creation ^ Description ^
-| ''SYMBOL = <value> '' | Creates a **local** symbol (string or integer) |
+| ''SYMBOLNAME = <value> '' | Creates a **local** symbol (string or integer) |
-| ''SYMBOL == <value> '' | Creates a **global** symbol (string or integer) |
+| ''SYMBOLNAME == <value> '' | Creates a **global** symbol (string or integer) |
-| ''SYMBOL := <value> '' | Creates a **local** STRING symbol |
+| ''SYMBOLNAME := <value> '' | Creates a **local** STRING symbol |
-| ''SYMBOL :== <value> '' | Creates a **global** STRING symbol |
+| ''SYMBOLNAME :== <value> '' | Creates a **global** STRING symbol |
+| ''DELETE/SYMBOL SYMBOLNAME'' | Destroy local variable''SYMBOLNAME'' |
+| ''DELETE/SYMBOL/GLOBAL SYMBOLNAME'' | Destroy global variable ''SYMBOLNAME'' |
+| ''SHOW SYMBOL SYMBOLNAME'' | Show content of the variable ''SYMBOLNAME'' |
+===== Aliases through symbols =====
+Create an alias ''EDT' with a frequently used command:
+<code DCL>
+EDT :== EDIT/EDT/COMMAND=SYS$LOGIN:EDTINI.DDT
+</code>
+Replace a command with the command you want:
+<code DCL>
+PRINT :== PRINT/NOBURST/NOFLAG/NOTRAILER/NOTIFY
+</code>
+This will replace the command ''PRINT'' with ''PRINT/NOBURST/NOFLAG/NOTRAILER/NOTIFY'' everytime you launch it.
+===== Operations with symbols =====
+==== Arithmetic operations (integers) ====
+<code DCL>
+$ APPLES = 10
+$ SHOW SYMBOL APPLES
+  APPLES = 10    Hex = 0000000A    Octal = 00000000012
+</code>