IBM 5150

Entering Your Own BASIC Program
A BASIC program consists of one or more BASIC
statements
that are preceded by line numbers. The line
numbers are used
by BASIC to control the sequence in
which the statements are run. You use
the line r"..
numbers to chaflge, add,ordelete lines within a program. '---~
You tell BASIC that you are entering a program by
beginning the line you type with a line number. After
the line
number comes a BASIC statement.
Unlike entering a command, the statement is
not run
when
you press the Enter key. A program is not run
until you type a RUN command.
Let's look at an example-a very simple program that
just displays the numbers 1,2, and 3.
1
Make sure BASIC is
ready-Ok is displayed.
2
Type this:
new
and press the Enter key.
3
Type this:
10 print
and press the Enter key.
4
Type this:
20 print 2
and press Enter.
",-......,
5
Type this:
30 print 3
and press Enter.
BASIC 3-20