Texas Instruments TI-99/4A User Reference Guide

Numeric Constants
Numeric constants must be either positive or negative real
numbers. You may enter numeric constants with any number of
digits. Values
are maintained internally in seven radix-I 00 digits.
This means that numbers will have 13 or 14 decimal digits
depending on the value of the number.
Scientific Notation
Very large or very small numbers are easily handled using scientific
notation.
A number in scientific notation is expressed as a base
number (mantissa) times ten raised to some power (exponent).
N umber ~ Mantissa x 1 O~:'r","p"l
To enter anum ber using scientific notation:
First. enter the mantissa (be sure to enter a minus sign first if it's
negative).
Enter the letter "E" (must be an upper-case E).
Enter the power of 10 (if it is negative, enter the minus sign before
you
enter the exponent).
The following are some examples of how numbers in scientific
notation are entered.
Examples:
>PR INT 1. 2
1.2
:'PRINT -,
-3
>PRINT 0
o
Number
3.264 x 10'
- 98.77 x 10"1
5.691 x 10--'
-2.47 x 10 Ii
Entered as
3.264E4
-98.77E21 or -9.877E22
5.691E-5
-2.47E-17
>PRINT 3.264E4
32640
>PRINT -98.77E21
-9.877E+22
Numeric constants are defined in the range of
-9.9999999999999EI27 to -IE-128, O. and lE-128 to
9. 9999999999999E 127.
Underflow - If an entered or computed number. when rounded. is
greater than -IE-128 and less than lE-128. then an underflow
occurs. When an underflow occurs. the computer replaces the value
of the number with a zero and the program continues running. No
warnmg or error IS gIven.
Overflow - If a number is entered or computed whose value when
rounded is greater than 9.9999999999999E127 or less than
- 9,9999999999999E 127_ an overflow occurs. When an overflow
occurs. the constant is replaced by the computer's limit. a warning
is given with the message "NUMBER TOO BIG:' and the program
rontinllPs rllnning Thf"'. r.nmplItFr's limit is
-9.9999999999999E127 or 9.9999999999999E127 as
appropriate, Note that ,,**., is printed if the exponent is greater
th::ln qq
User's Reference Guide
>PRINT 0
o
>PRINT -9E-130
o
>PRINT 9E-142
o
>PRINT 97E136
* WARNING:
NUMRFR rnn RIC,
9.99999E+**
>PRINT -108E144
* WARNING:
NUMBER TOO BIG
-9.99999E+**
11-9

Texas Instruments TI-99/4A Specifications

General

Brand	Texas Instruments
Model	TI-99/4A
Category	Desktop
Language	English