Radio Shack TRS-80 User Manual page 5

Table
of Contents
This
User's
Manual and
You
4
Part
A: Chapter
1
Computer
Etiquette.
PRINT,
NEW,
and
RUN
7
Chapter
2
Expanding
a
Program. LIST,
REM, END,
LET,
WHAT?,
HOW?
11
Chapter
3
Math
Operators
17
Chapter 4
Scientific
Notation
23
Chapter
5
Order of Operations.
Use of Parentheses
25
Chapter
6
Relational Operators.
IF-THEN,
GOTO
'
[
29
Chapter
7
INPUTting
Data
33
Chapter
8 Calculator Mode.
MEM, SORRY '..'.'.'.
'.37
Chapter
9 Using Cassette
Tape
for
Mass
Storage.
CLOAD,
CSAVE
41
Chapter
10 Loops.
FOR-NEXT,
STEP, CLS,
Break
Key
45
Chapter
1 1
Timer
Loops. LIST
###,
RUN
###,
STOP,
CONT
53
Chapter
1
2
Formatting Output with
TAB
61
Chapter
1
3
Nested Loops
65
Chapter
14
INT
Function
69
Chapter
15
More
Branching
Statements. Subroutines.
ON-GOTO,
GOSUB
ON-GOSUB,
RETURN
77
Chapter
16
READ, DATA, RESTORE.
String Variables
A$
and
B$
85
Chapter
1
7
ABS
Function
93
Chapter
18 Level
I
Shorthand
Dialect. Multiple-Statement Lines
95
Chapter
1
9 Generating
Random
Numbers
with
RND
99
Chapter 20 Video
Display Graphics. SET,
RESET
105
Chapter
21
Arrays Using
A(X)
123
Chapter 22 Advanced
Graphics.
PRINT
AT,
POINT
133
Chapter 23 Flowcharting
141
Chapter 24
Logical Operators.
* (AND), + (OR)
!
.
T47
Chapter 25 Advanced
Subroutines
155
Chapter 26 Debugging Programs
165
Part B:
Sample Answers
to
Programming
Exercises
in
Chapters
3
through 25 177
Part C: Prepared
User's
Programs
201
Appendix:
Appendix
A: Prepared User Subroutines
216
Appendix
B:
Cassette Data
Files
221
Appendix
C:
Combined
Function and
ROM
Test 225
SUMMARY
OF LEVEL
I
BASIC
232