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Ex3. Input of unknown length (20 marks)

Read a sequence of natural numbers from user input one by one, and store them in a row vector. Output this row vector.

The sequence has unknown length, but it ends with -1. The -1 is merely a signal for the end of input and should not be included in your output. Notice that -1 is a safe terminator value since it is not a natural number, but 0 for instance is not a safe terminator value. The length of the sequence can be 0, i.e., the sequence starts with -1, and in this case the output should be empty (disp([]) prints nothing!).

Hint: Which is more suitable for this exercise, for loop or while loop? Why?

Sample test cases

Input:

1
2
3
4
5
-1

Output:

     1     2     3     4     5

Input:

-1

Output:

Format

You should submit a compressed file containing a Matlab source file ex3.m