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!
Project Euler: Problem 1, Multiples of 3 and 5
Number of Circles in a Number
Find the maximum number of decimal places in a set of numbers
Count up then down
Sum the Digits of a Number
Decrypt the cypher using XOR encryption (for beginners)
Divisors for big integer
Replicate elements in vectors
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