Test if arguments of the function are all variables (workspace variables names).
Return 1 if yes, 0 if no.
For example :
length!! and not "not isempty"... good point!
Calculate the area of a triangle between three points
Multiply 2 numbers
Check if number exists in vector
Circular Primes (based on Project Euler, problem 35)
Volume of a box
Numbers spiral diagonals (Part 1)
Mirror, mirror on the wall, who is fairest of them all?
Narcissistic number ?
Find my secret number
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