Hello Dave,
If you look at the keyboard section of your
calculator, you can see that most of BASIC
language commands are associated with one of the
buttons. For example on top of the G button, you
see [For], and on top of the C button there is
[GOSUB] which is another BASIC statement. When you
are in the Programming mode, pressing [Shift] followed
by one of the keys would display the corresponding
command on the screen. So now you know what is available
on your calculator's BASIC.
In order to write a program,
1- press the green button that says [BASIC] twice to
get into the programming mode.
2- First you enter a line number, such as 10, followed by
a name for your program inside a " ", such as "P1".
3- When the stement in line 10 is finished, press the [Enter]
button. The calculator responds by placing an [:] sign
right after the line number which means line 10 in now
in the calculator's memory.
4- Now you enter another line number, such as 20, and
then you enter a BASIC statement that is your first
line of program followed by pressing [Enter].
5- You carry on the same way until your entire program is
entered into your calculator's memory.
6- Now you press the green button [BASIC] again to get
into the [RUN] mode.
7- Either type RUN or press [SHIFT] follwed by [,] and
then enter your program's name inside quotations, such as
"P1" followed by pressing [Enter].
8- Now your program gets executed/interpreted.
Look at a sample program here,
http://www.rskey.org/detail.asp?manufacturer=Sharp&model=EL-5500II
You can also post the equation that you are trying to calculate,
and I will show you how to code it in EL-5500II Basic.
Best wishes
ziloo