This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
Back to basics 7 - Equal NaNs
Who knows the last digit of pi?
Arrange vector in ascending order
Generate a NaN...on purpose
Square the input
find a specific element from an matrix
Find remainder when x is divided by 3
Find the last digit
modulus of a number
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