addAt(int index,int item)

You used this method in client class. But you didn’t taught it.

@yogesh4120,
The addAt method adds a particular int item at the mentioned index. If you have any further query please do let me know.

ya I know it but it is not taught in any video

@yogesh4120,
It is not a huge concept. It is just a method and it can be learnt on the go.

okay I know that. but still I am getting some problems as videos are not in series.

@yogesh4120,
I will let the administration know about this

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