Checks if a user variable with the specified name exists in the specified scope.
Parameters:
scope
The scope (context) with which the variable is associated. (See "About User Variables" below.)If this parameter is not specified, the global scope is assumed by default.
name
The variable name.
Returns:
true
- the variable exists;
false
- the variable does not exist.
See Also:
setVar(), getVar()
${include ../refs/user_vars.htm}