The following question was asked in my topology assignment and I was unable to solve it, so I am looking for help here.

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> Example of non separable subspace of a separable hausdorff space.
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I couldn't construct such example and I looked for an answer by searching mathstackexchange and found this answer :[Density character of a subspace of a topological space.](https://math.stackexchange.com/questions/161676/density-character-of-a-subspace-of-a-topological-space/161679#161679)

But this is beyond my understanding as I have just started 1st course in topology (2 weeks back) and I am unable to understand that terminology.

So, kindly give a answer which is for a person that has just started learning topology. I am following Lecture notes and Assignment sheets of the course and not any textbook.

Thank you!