WMLScript Variable
Naming Conventions
In
WMLScript, the naming conventions of variables are the same as that
of functions. Variable names are case-sensitive and they cannot be
the same as WMLScript reserved words and keywords. The first
character of a variable name has to be a letter or an underscore. The
rest of the characters can be letters, numbers, or underscores.
Scope and Lifetime
of WMLScript Variables
In
WMLScript, after you have declared a variable in a function, you can
modify or read the value of the variable until the function ends. The
variable will be destroyed when the execution of the function is
finished. Hence, the scope of a WMLScript variable is from the place
where it is declared to the end of the function, and the lifetime of
it starts from the time it is declared to the time when the function
finishes. This means you can use the same variable name in different
WMLScript functions, since the scope of a variable does not go
outside the function where the variable is declared.
Note
that block statements have no effect in variable scoping (a block
statement is a group of statements that are enclosed within {}). For
example, the following code is correct in WMLScript:
function
wmlscript_func()
{
{
var
wmlscript_variable;
}
{
wmlscript_variable =
"Welcome to our WMLScript tutorial";
}
wmlscript_variable
= "WMLScript Tutorial";
}
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