Assertion

Recursion :: -- The method calls itself. Until  condition is satisfied & executes in reverse manner.

Assertions – 1.4 Ver

Very common way of debugging is usage of SOP statements. Bu the problem with sops is after fixing the bug compulsary we have to delete SOP statements otherwise these sops will be executed at run time for every req, which creates performance problem & disturbs server logging.

To overcome this problem sun people introduced Assertions concept in 1.4 ver.

The main adv of assertions when compare with Sops is after fixing the bug, we are not required to remove assert statements because they wont be executed by default at run time. Base don our requirement we can enable / disable assertions & by default assertions are disabled.

Hence the main objective of assertions is to perform debugging.

Simple version

Augmented version

Simple Assertion::

  assert(b) – b is of Boolean type – if b is true our assumption is satisfied & hence rest of the program will be executed normally.

If b is false our assumption fails i.e somehwhere something goes wrong & hence the program will be terminated abnormally by raising assertion error. Once we got assertion error we will analyze the code & we can fix the problem.

By default assert statements will not get executed but we can enable assertion by using  

-ea  option

assert(x>10);

Augmented version::::

assert(x>10):”x is greater than 10”