Texas Instruments TI-99/4A User Reference Guide

NEXT
NEXT control·variable
Thf'
NEXT statement is always paired with the FOR-TO-STEP
statement for construction of a loop. The control-variable is the
same one
that appears in the corresponding FOR-TO-STEP
statement.
The N EX T statement actually controls whether the computer will
repeat the loop or exit to the program line following the
NEXT
statement.
When the computer encounters the NEXT statement, it adds the
previously evaluated
increment in the STEP clause to thf' cantm/-
variable.
It then tests the control-variable to see if it exceeds the
previously evaluated
limit specified in the FOR - TO-STEP
statement. If the control-variable does not exceed the hmit, the loop
is repeated.
11-56
Examples:
>NEW
>100
REM COUNTING FROM
1 TO
10
>110
FOR X=1 TO 10
>120 PRINT
Xi
>130 NEXT X
>140
END
>RUN
1 Z
3
4
5
6
7 8 9
10
** lJON~ **
>NEW
>100 REM ROCKET COUNTDOWN
>110 CALL CLEAR
>120 FOR 1=10 TO 1 STEP -1
>130 PRINT I
>140 FOR DELAY=1 TO ZOO
>150 NEXT DELAY
>160 CALL CLEAR
>170 NEXT I
>180 PRINT "BLAST OFF!"
>190 REM CHANGE SCREEN COLOR
>200 FOR COLOR=2 TO 16 STEP 2
>210
CALL SCREEN(COLOR)
>220 FOR DELAY=1 TO 100
>~50 NEXT DELAY
>240 NEXT COLOR
>250 END
>RUN
--computer wilL flash countdowl
BLAST OFF!
--screen wiLl chClnge coLor
8 times
** DONE: **
User's Reference Guide

Texas Instruments TI-99/4A Specifications

General

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