Amitava, can you please be a little more specific than "mentioned earlier"? Remember, you can put links into your description with notation.
corrected. thanks, Ned.
Make a checkerboard matrix
Back to basics 25 - Valid variable names
Get the length of a given vector
Generate pi using logarithm
Simple date to serial no. conversion
area of an annulus
Given a number N, find the smallest prime P>N
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