Given an existing $2$D array, A$,$ we want to add a value, x$,$ to the first row. To do this we add the line:

$\%$ add x to row $1,$ after the last column

A$(1,$length$($A$)+1)=$ x;

What will be the result of this line?

Given an existing $2$D array, A$,$ we want to add a value, x$,$ to the first row. To do this we add the line:

$\%$ add x to row $1,$ after the last column

A$(1,$length$($A$)+1)=$ x;

What will be the result of this line?

The value x will be concatenated onto the first row of A$.($ie what we wanted$).$ Nothing else will change.

The value x will be added to the first row and $0$ will be added to all other rows. $($ie MATLAB will make all of the rows the same length after x is added by adding $0$ to all other rows$)$

The value x will be added to every row. $($ie MATLAB will make all of the rows the same length after x is added by adding x to all rows$)$

The assignment will fail with an error because the dimensions don't match $($ie we can't extend the single row$)$