need add abs to the test cases
Return 'on' or 'off'
Add a row of zeros on top of a matrix
Sum the 'edge' values of a matrix
Solving Quadratic Equations (Version 1)
Calculate area of sector
Flip the vector from right to left
Append two matrix as shown below example
Find out rooms, peak to peak, average for a square wave.
Find out magnitude of vector
Find out total non zero element of matrix
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