Casio FX-730P Owner's Manual page 73

4-3 Variables
<Precautions in Using Variables>
1) If the names of the numeric variable and character variable are the same, the
same memory space will be used. For this reason, it will therefore not be
possible to use a numeric variable A and a character variable A$ at the same
time. If the following program is executed, an error (Error 6) will occur on
line 20. (See page 69 for details.)
1 0 A$='' CAS IO
11
······Assigns character string "CASIO" to charac-
ter variable A$.
20
PRINT A
30
END
···· ·· Displays the content of numeric variable A.
*
Excluding array variables in the DIM mode.
2) Care should be taken when using an array variable in the DEFM mode since
it uses the same memory space as some of the simple variables. In the figure
shown
below, the variables combined with equal signs (=) use the same
memory space. (Although numeric variables are shown, these relations are
the same as for character variables.)
A=A(O)
8 = A(l)= 8(0)
C = A(2)= 8(1)= C(O)
D = A(3)= 8(2)= C(l)= D(O)
Y = A(24)= 8 (23)= C(22)= ··· ·· · ·· · ··· = Y(O)
Z = A(25)= 8(24)= C(23)=··············· = Y(l)= Z(O)
i
Simple variables
Array variables
For example, if we execute the following program, the content of variable C
will be 10.
10
DE FM
20 C=0
30 A(2)=10
40
PRINT c
50
END
3) Since variables are common in all program areas, care should be taken in
assigning variables when creating programs using multiple program areas.
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