[R] removal of an element from a vector

[gynmeerut]

Dear All,
  I have some problem in R which I'm explaining using an example:
x<-(120,235,172,95,175,200,233,142)
i want to remove the elements which are lesser than 100 and as a result i want two vectors

y<-(containing elements <100)
z<-(remaining elements)


Moreover if I wish to use two different programs for vectors y and z.
which command shall I use(will IF-ELSE  work ?)



Thanks and regards,

GS