Why did Hamlet pretend to be insane?

After
speaking with his father's ghost,learns
that his uncle, , assassinated his father by pouring
poison into his ear
while he was sleeping in an orchard. Upon discovering his uncle's

treachery,promises to avenge his father's death by murdering King Claudius. Hamlet
also
understands that Claudius will be wary of him and does not want him to
suspect that he is
plotting against him. Hamlet is also aware that Claudius
will begin spying on him and threatens
to interrupt his bloody plans.
Therefore, Hamlet decides to feign madness as a way to confuse
Claudius and
distract him from becoming suspicious. Hamlet essentially desires to conceal
his
malevolent intentions and suppress Claudius's suspicions. Initially,
Claudius entertains the
idea that Hamlet may be acting strange because he is
lovesick. However, Hamlet's madness
influences Claudius to send him away to
England, where Claudius plans on having him murdered.
Unfortunately, Hamlets
madness influences Claudius to act more suspicious of him and draws
attention
to himself. While Claudius may not suspect that Hamlet is plotting his murder, he
does
eye him with suspicion and wants him as far away from Denmark as
possible.