For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Select every other element of a vector
First N Perfect Squares
Program an exclusive OR operation with logical operators
frame of the matrix
Back to basics - array operations
Broken numlock key, oppps !
Find my birthday
Return the names and values of the input arguments of a function
Sum of diagonals elements of a matrix
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