Remove the middle element of a vector?
[1,2,3] should return 2
[1,2,3,4] should return 2
 should return empty vector
Remove or return ?
keep it or remove it? confused example.
Find all elements less than 0 or greater than 10 and replace them with NaN
Right and wrong
Number of digits in an integer
Create sequnce 1 4 9 16 25.........
Matrix of almost all zeros, except for main diagonal
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