Texas Instruments TI-73 用户手册

     Chapter 1: Operating the TI

N73

7301ENG.DOC   CH1 Operating the TI-73, English   Julie Hewlett   Revised: 07/29/98 11:55 AM   Printed: 05/19/99

8:58 AM   Page 12 of 24

 

A function returns a value. Generally, the first letter of each

function is lowercase on the TIN73. For example, 

 is a

function because it returns a value, 

 or 

.

An instruction initiates an action. Generally, the first letter of

each instruction name is uppercase. For example, 

 is an

instruction that draws a pixel on the graph screen.
Most functions and some instructions take at least one

argument. An open parenthesis (

) at the end of the function or

instruction name prompts you to enter an argument. Complete

the function with an end parenthesis, E.
Note: Do not use the Text editor to enter names of functions

or instructions. For example, you cannot enter 

, then 

, then

 to calculate the log

of a value. If you did this, the calculator

would interpret the entry as implied multiplication of the

variables 

, 

, and 

.

When this guidebook describes the syntax of a function or

instruction, each argument is in italics. Optional arguments for

a function are signified by brackets [ ]. Do not enter the

brackets.

 

You can find most functions and instructions on menus (in

other words, not directly from the keyboard).

 

To display a menu, press the key associated with the menu. Up

to four separate menus are displayed from which you choose

the menu item you want.

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