Radio Shack TRS-80 PC-3 User Manual

Input
INS
Type in the !. The display looks like this:
Input
Display
10: PRINT "GOODBYE."
Display
10: PRINT "GOODBYE!II
inL~
Remember to press (ENTER) so the correction will be entered into the program.
NOTE: If you wish to DELete an entire line from your program, just type in the line number and the original line will be elimi-
nated.
Example 3 - Using Variables in Programming
If you are unfamiliar with the use of numeric and string variables in BASIC, reread these sections in Chapter 4.
Using variables in programming allows much more sophisticated
use of the PC-3's computing abilities.
Remember,
you assign simple numeric variables using any letter from A to Z.
A = 5
To assign string variables, you also use a letter following by a dollar sign. Do not use the same letter in designating a numeric and
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Radio Shack TRS-80 PC-3 Specifications

General

Type	Programmable Calculator
Model	TRS-80 PC-3
Category	Calculator
RAM	1.9 KB
Display	24-character LCD
Power Source	2x CR2032 batteries

Summary

Limited Warranty

Radio Shack Limited Warranties

Details warranty period, conditions, and remedies for equipment defects.

Limitation of Liability

Outlines restrictions on Radio Shack's liability for damages.

Service Policy

Chapter 2: Introduction to the PC-3

Reset and Battery Management

Procedures for resetting the PC-3 and replacing batteries.

Chapter 3: Using the PC-3 as a Calculator

Simple Calculations

Performing basic arithmetic and understanding input/output.

Handling Errors

Addressing error messages and their solutions.

Chapter 4: Concepts and Terms of BASIC

Variables and Expressions

Understanding constants, variables, and their usage.

Chapter 5: Programming the PC-3

BASIC Statements and Commands

Introduction to BASIC syntax, verbs, and commands.

Chapter 7: Using the PC-3 Printer/Cassette Interface

Cassette Recorder Operations

Saving and loading programs and data on tape.

Chapter 8: BASIC Reference

Commands Reference

Instructions for controlling the computer's environment.

Verbs Reference

Action words used within BASIC programs.

Functions Reference

Mathematical and string manipulation operations.

Chapter 10: Troubleshooting

Machine Operation Issues

Solutions for common problems with device functionality.

BASIC Debugging Tips

Strategies for finding and correcting program errors.

Appendix A: Error Messages

Appendix F: Specifications