I am not able to get whats the tutor wants t say by arrry pointer

#1

what is the meaning of a[i] , a[i]+n…in the void rotate stl

#2

so this is a functionality procided by c++ stl
where u can simply rotate the entire aray from a beginning index to some end index by
writing
rotate(arr+startindex , arr+endindex)
this rotated the array
if suppose u say startindex =0 and endindex = 5
then only 0 ,4 index is rotate
the 5th index is not included

#3

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