Return the number of days in a given month in 2017. If the input is not a valid month number, return -1.
Input: m = 1
Outpu: d = 31
Input: m = 2
Output: d = 28
Input: m = 13
Output: d = -1
You cannot use IF statements
Angle between Two Vectors
Set some matrix elements to zero
Sum of diagonals elements of a matrix
Matlab Basics II - squares
Product of Each Column
Remove the air bubbles from a vector
How many Integers?
Separate even from odd numbers in a vector - without loops
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