Variables and memory management 14-7
Home variables It is not possible to store data of one type in a variable of 
another type. For example, you use the Matrix catalog to 
create matrices. You can create up to ten matrices, and 
you can store these in variables M0 to M9. You cannot 
store matrices in variables other than M0 to M9. 
Cate-
gory
Available names 
Complex Z0 to Z9
For example, (1,2) Z0 or 2+3i 
 Z1. You can enter a complex 
number by typing (r,i), where r represents 
the real part, and i represents the 
imaginary part.
Graphic G0 to G9
See“Graphic commands” on page 18-21 
for more information on storing graphic 
objects via programming commands. See 
“To store into a graphics variable” on 
page 17-5 for more information on 
storing graphic object via the sketch view.
Library Aplet library variables can store aplets 
that you have created, either by saving a 
copy of a standard aplet, or downloading 
an aplet from another source.
List L0 to L9
For example, {1,2,3} L1.
Matrix  M0 to M9 can store matrices or vectors. 
For example, [[1,2],[3,4]] M0.
Modes Modes variables store the modes settings 
that you can configure using 
MODES.
Notepad Notepad variables store notes. 
Program Program variables store programs.
Real  A to Z and θ. 
For example, 7.45  A.
HP 39gs English.book  Page 7  Wednesday, December 7, 2005  11:24 PM