Texas Instruments TINSPIRE Teacher Software Guidebook - Page 446

• Characters can consist of letters, digits, and the underscore character (_). Letters can be U.S. or Greek letters (but not Π or p), accented letters, and international letters. • Do not use c or n from the symbol palette to construct a variable name such as c1 or n12. These may appear to be letters, but they are treated internally as special symbols. • You can use uppercase or lowercase letters. The names AB22, Ab22, aB22, and ab22 all refer to the same variable. • You cannot use a digit as the first character of xxx or yyy. • Do not use spaces. • If you want a variable to be treated as a complex number, use an underscore as the last character of the name. • CAS: If you want a variable to be treated as a type of unit (such as _m or _ft), use an underscore as the first character of the name. You cannot use subsequent underscores in the name. • You cannot use an underscore as the first character of the name. • You cannot use a preassigned variable, function, or command name, such as Ans, min, or tan. Note: For a complete list of TI-Nspire™ functions, refer to the Reference Guide. • Library documents and library objects are subject to additional naming restrictions. For details, see the "Libraries" section of the documentation. Here are some examples: Variable names Valid? Myvar, my.var Yes My var, list 1 a, b, c Log, Ans Log1, list1.a, list1.b No. Contains a space. Yes No. Preassigned to a system function or variable. Yes 3rdTotal, list1.1 No. xxx or yyy starts with a digit. 434 Using Variables