Generate a single string from a matrix (or cell)

Hi. I have a vector A that is [1:5]' and also I have a string 'Hi'. (I just use a of length of 5 for simplicity, but can be large) (1) how can I generate a matrix B in such a way

Hi 1
Hi 2
Hi 3
Hi 4
Hi 5

(2) How can I convert matrix B to a 'single' string C as it is (i.e. after each Hi there is a space and after each number there is an enter (mew line character). In other words string C is

Hi 1
Hi 2
Hi 3
Hi 4
Hi 5

Note that Bi is a matrix or cell array, but C is only a string.

Answer 1

[Walter Roberson]

With R2017a or later,

strjoin( "Hi " + (1:5).', newline )

For R2016b you can use

strjoin( string('Hi ') + (1:5).', newline )