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CHAPTER 7
FORMATTING YOUR
OUTPUT
You have probably used the tab and margm features on a
typewriter. They make it easier to format the text on a page.
SD-lOi15 also has tabs and margins that you can set. But it goes
beyond the capabilities of a typewriter because besides having
tabs that go across the page, called horizontal tabs, SD-lo/l5
has vertical tabs that go down the page.
In this chapter we will discover how to use:
l Horizontal tabs
l Vertical tabs
l Left and right margins
USING HORIZONTAL TABS
When you turn SD-lo/l 5 on there are horizontal tabs set au-
tomatically every eight spaces. It’s easy to use these tabs; you
just send a CHR$(9) to SD- lo/15 and the print head will move
to the next tab position. CHR$(9) is the ASCII code <HT>
for horizontal tab.
Try this one line program to demonstrate the use of the default
horizontal tabs.
18 'Tabs demo
20 LPRINT "one" CHR$(9) rrtwo" CHR$(9) “three” CHR$(9)
"four"
Here’s what will print:
one
two
three four
Even though the words are different lengths, they are spaced
out evenly by the horizontal tabs.