Write a function that, given any input vector, returns the number of times non-negative values appear in the vector. You must use looping and branching (examining each element) to implement this function.

Again, the input calling argument is a 1D array (i.e., a vector).

For example, given the input [1;-1;1] the result is 2

For example, given the input [1,2,-3,4,-3,-4,3,-2,3,0,2] the result is 7 For example, given the input [0,1,2] the result is 3 For example, given the input [-5,-3,-1] the result is 0

Note that the result is returned by the function, not printed by the function.

Remember that the input calling argument's values come from outside of the function and are not to be set within the function.

For extra credit, provide (as a comment) the one-line Matlab expression that could calculate the above.