No. This is not a "we do your homework" site. I will help you to learn how to do it.
Let's suppose your list has a variable for the first element, and each element has a variable for the next element. Then the logic looks like this in pseudo-code:
Element current = list.firstElement
while (current != null)
test if current is the element you are searching for
if found, break out of loop
current = current.next // go on to next element