What is the difference between effect and affect?Please tell me the difference between them as fast as possible.

Simply put, effect is a noun
and affect is a verb.

You will
use the word effect to name a result of something that has
caused a change.  If you are writing an essay that analyzes a scene, event or
character's action, and you would like to remark on the
effect this has on the other characters or the events to
follow, then, as I have just done, you use the word effect.
Here's an example using Shakespeare's play
Macbeth:

The
effect of Lady Macbeth's part in the murder of Duncan does
not come back to haunt her until the final Act of the play, when she has clearly become
unhinged, sleepwalking and attempting to wash her hands of her guilt in the
deed.

Someone or something can be
affected.  In this case, they or it have/has been changed
by some event or other person.  Here's an example, also using
Macbeth:

Lady Macbeth is
very affected by her part in the murder of Duncan.  Though
she seems strong and without remorse in the early acts, she enters Act V as a broken and
lost woman.

So, remember --  an
effect is a thing (noun); and someone or something must be
affect --ed, an action (verb).