Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
Is my wife right? Now with even more wrong husband
Compute LOG(1+X) in natural log
Summation of array
Vector indexing: lower than mean
Matrix Generation from Vector Multiplication
Simple String Concatenation
Replace 0 indices in array with 1's
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