NEXT - QB64 Wiki

NEXT

From QB64 Wiki

Jump to: navigation, search

NEXT is used in a FOR counter loop to progress through the loop count or to RESUME on the NEXT code line after an error.


Syntax:

FOR i = 1 TO 10
.
. 'loop code
.
NEXT [i]
OR
RESUME {NEXT|linenumber|linelabel}


  • NEXT is required in a FOR loop or a "FOR without NEXT" error will occur.
  • The FOR variable name is not required after NEXT.
  • NEXT can be grouped with other NEXTs in nested FOR loops using colons like NEXT: NEXT
  • NEXT can also end more than one nested FOR loop using comma separated variables like NEXT i, j
  • NEXT increases the FOR loop count so the variable value AFTER the FOR loop will be one more count than the requested count.
  • Also used in ON ERROR GOTO procedures after RESUME to return the program to the next code line only after an error occurs.


Example: Finding the FOR variable value AFTER a simple counter loop to 10.

FOR i = 1 TO 10 PRINT i; NEXT i PRINT "AFTER the LOOP, NEXT makes the value of i ="; i

1 2 3 4 5 6 7 8 9 10 AFTER the LOOP, NEXT makes the value of i = 11

Result: The last value of i = 11 although FOR only looped 10 times. Only use the count values while inside of the loop or compensate for this behavior in your code!


See also:



Navigation:
Go to Keyword Reference - Alphabetical
Go to Keyword Reference - By usage
Go to Main WIKI Page
Personal tools