while ... wend

Execute a block of commands while expression remains true.

Syntax:

while
commands
{exit while}
wend

while statement define the start of the block of command to be looped.
wend statement define te end of block, alternatively you can use end while statement instead.

Example:

setautoback(50)
i=0
while inkey <> k_esc ------------------------ will loop until esc key is pressed
i=i+1
prints(i)
wend ----------------------------------------------- you can use indifferently wend or end while