While and for are pretty similar, but sometimes you need to do a not recommended thing - change cycle boundaries.
In this situation while and for are different. For calculates boundaries once per run and while calculates boundaries on every iteration.
Consider this code sample:
set x = 5
for i=1:1:x {
write "i: ", i,", x: ", x,!
set x = x+1
}You'll get this output:
i: 1, x: 5
i: 2, x: 6
i: 3, x: 7
i: 4, x: 8
i: 5, x: 9
Compare to while cycle:
set i = 1
set x = 5
while (i<=x) {
write "i: ", i,", x: ", x,!
3,907
