How to add one digit to another digits?

For example, I have a number b=5; and i need to add it by another digits, for example 1234 and get the answer 12345. Code may show like: set(handles.text1,'string',1234+b) An error is "1234+b" and i don't know how format it that one digit adds to another digits. Thanks in advance.

Answer 1

[Paulo Silva]

strcat('1234','5')

you can convert any number to string with num2str or other similar function

strcat('1234',num2str(5))

b=5;

strcat('1234',num2str(b))

[Eggo Ogge]

Thank you, i understand this.

Answer 2

[Walter Roberson]

The answer to your question as phrased is:

set(handles.text1, 'string', 1234*10^max(1,ceil(log10(b+1))) + b)

I would suggest, though, that you instead consider

set(handles.text1, 'string', sprintf('%d%d', 1234, b))

EDIT: put in max() to correct for the possibility that b is 0.

[Eggo Ogge]

Thank you for you help.

[Paulo Silva]

Walter's solutions are always very good

[Eggo Ogge]

Can I ask one more question? If there is not digits, but string, i have something like '=a21:' and by this add hexadecimal number.

g=2F4

sprintf('%s%x',=a21:,g). Can it be something like that?

[Walter Roberson]

sprintf('%s%s', '=a21:', '2F4');

Or more simply

['=a21:', '2F4']

It is not possible to create a _numeric_ value in hex format.

Perhaps, though, you might like to use

sprintf('%s%x', '=a21:', hex2dec('2F4'))