Additional test cases have been added.
Number of 1s in a binary string
Determine Whether an array is empty
Return 'on' or 'off'
02 - Vector Variables 4
04 - Scalar Equations 3
Replace 0 indices in array with 1's
Simple Vector Addition
Matrix Ax=B problem
String Delimination and Outputting
Check if inputted variable is a string or a number
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