How can you print 1 2 3 2 1 using for loop?

Answer 1

It may not be worthwhile to write a loop at all in such a simple case. On the other hand, you can make two loops, one for the ascending part, and one for the descending part. Finally, you can use a single loop, and a condition inside it: use a counter "i" = 1 to 5; if i < 4 print i, otherwise print 6 - i. This latter would be useful if, instead of simply printing the values indicated, you needed several commands within the loop; in this case, having a second loop is simply not practical.