GlobalVariable :: exist - Does global variable exist
The function returns, whether a global variable with the name passed in sGlobalVariable exists or not. The function returns true , when the variable could be located and false otherwise.
In order to avoid exceptions, the function might be called before calling remove() or create() .
// fragment
GlobalVariable userName("userName");
if ( !userName.exist() )
userName.create(Value(""));
userName.value() = "Paul";
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false .