eVec = Hello
( eVec is a string, which is a vector of characters )
Return unique values without sorting
Magic is simple (for beginners)
Replace multiples of 5 with NaN
frame of the matrix
Finding perimeter of a rectangle
03 - Matrix Variables 6
07 - Common functions and indexing 5
04 - Scalar Equations 2
02 - Vector Variables 1
06 - Matrix Equations 3
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