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Table Of Contents
Variable names Valid?
Myvar, my.var
Yes
My var, list 1
No. Contains a space.
a, b, b12, b
12
, c, d
Yes. Note that variables
b12
and
b
12
are distinct.
Log, Ans
No. Preassigned to a system function or variable.
Log1, list1.a, list1.b
Yes
3rdTotal, list1.1 No. xxx or yyy starts with a digit.
Locking and Unlocking Variables
Locking lets you protect variables from modification or deletion. Locking
prevents unintended changes to a variable.
Time and altitude lists can be locked to
ensure problem fidelity.
Reference function
f1
can be locked to
prevent unintended change.
Variables you Cannot Lock
System variable Ans
stat. and tvm. variable groups
Using Variables 173