Texas Instruments TI-73 用户手册

     Chapter 12: Programming

7312ENG.DOC   CH 12 Programming, English   Julie Hewlett   Revised: 07/29/98 12:17 PM   Printed: 05/19/99 9:02

AM   Page 232 of 32

 

While   8

 

Use 

 to test condition before the commands in the loop

are executed. 

 performs a block of commands WHILE

condition is true (non-zero). condition is frequently a

relational test (Chapter 2: Math Operations) and is tested

when 

 is encountered. 

 identifies the end of block.

When condition is false (zero), the program executes each

command following 

. 

 instructions can be nested.

 condition

block (while condition is true)

command

Write a program named 

 that increments two variables, I

and J, and displays the value of J when I‚6.

PROGRAM:LOOP

:0"I

:0"J

:While I<6

:J+1"J

:I+1"I

:End

:Disp "J=",J

:Pause

 

Repeat   8

 

Use 

 to test condition after the commands in the loop

are executed. 

 executes block UNTIL condition is true

(non-zero). It is similar to 

, but condition is tested when

 is encountered; therefore, the group of commands is

always executed at least once. When condition is false (zero),

 instructions can be nested.

condition

block (until condition is true)

command

³