GEOS SDK TechDocs
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4.5 Procedures
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5 Commands
Tcl allows the definition of variables and the use of their values either through $-style variable substitution, the
var
command, or a few other mechanisms. Variables need not be declared: a new variable will automatically be created each time a new variable name is used. Variables may be either global or local. If a variable name is used when a procedure is not being executed, then it automatically refers to a global invocation of the procedure. Local variables are deleted whenever a procedure exits. The
global
command may be used to request that a name refer to a global variable for the duration of the current procedure (somewhat analogous to
extern
in C).
GEOS SDK TechDocs
|
| 4.5 Procedures
| 5 Commands