Add only the positive numbers of x
x = [-2 -1 0 1 2 3]
the positive numbers are: 1 2 3, so their sum is 6
First N Perfect Squares
First non-zero element in each column
Is A the inverse of B?
07 - Common functions and indexing 2
07 - Common functions and indexing 4
i forgot to use capital I
Reduce the logic
Add the odd numbers
Check capital letters
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