Texas Instruments TI-99/4A - Numeric Expressions

Numeric Expressions
Numeric expressions are constructed from numeric variables.
numeric
con..<;tants. and function references using arithmetic
operators (+ - */ 1\). All functions referenced in an expression must
be either functions supplied in TI BASIC (see sections on Built-In
Fllnr:tion!'\) or rlf':fi.nf~rl hya DEF !'\tatement. The two kinds of
arithmetic operators (prefix and infix) are discussed below.
The prefix arithmetic operators are plus ( +) and minus ( -) and are
used to indicate the sign (positive or negative) of constants and
variables. The plus sign indicates the number following the prefix
operator (+) should be multiplied by + 1, and the minus sign
indicates the number following the prefix operator ( -) should be
multiplied by
-1. Note that if no prefix operator is present, the
number is treated as if the prefix operator were plus. Some
examples of prefix operators with constants and variables are:
10 -6 +3
+A -W
The infix arithmetic operators are used for calculations and include:
addition ( +), subtraction (-), multiplication (*)! division (I), and
exponentiation (1\). An infix operator must appear between each
numeric constant and/or variable in a numeric expression. Note
that multiplication cannot be implied by simply placing variables
side
by side or by using parentheses. You must use the
multiplication
operator (*).
Infix. and prefix operators may be entered side by side within a
numeric expression.
The operators are evaluated in the normal
way.
11-12
Examples:
>NEIi
>100 A=6
>110 8=4
>120 C=20
>130
D=2
>140 PRINT A*B/2
>150 PRINT C-D*3+6
>160
END
>RUN
12
20
** DONE **
>PRINT 3+ -1
2
>PR1NT 2*-3
-6
>PR1NT
6/-3
-2
User's Reference Guide