What does this definition of contiguous subsequences mean?

Question

I don't understand the following definition of a contiguous subsequence:

A contiguous subsequence of a list S is a subsequence made up of consecutive elements of S.

If S is {5, 15, -30, 10, -5, 40, 10}
then 15, -30, 10 is a contiguous subsequence.

What makes 15, -30, 10 a contiguous subsequence?

Answer 1

Lets say you have some elements in a subsequence,

then it will be called contiguous iff the elements taken in order are consecutive in original set.

E.g,

Sequence=2,3,abc,5.6,4,abhishek;

Subsequence=5.6,2,abhishek;

Contiguous Subsequence=3,abc,5.6 or 5.6,4,abhishek or abc,5.6.

Remember, The sequence itself is always a contiguous subsequence.

Hope it makes the concept clear!