Given an array, Find the sum of all of the elements in it
Input x = [1 2 3 5; 4 5 6 7];
Output y is 33
Find all elements less than 0 or greater than 10 and replace them with NaN
Determine Whether an array is empty
Count decimal digits of a number
Add a row of zeros on top of a matrix
Length of the hypotenuse
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