## How to Concatenate two large numbers in Matlab

on 26 Nov 2012

### Matt J (view profile)

Hello everyone, This could come as a very basic question. I'm trying to concate 2 large numbers. For example: 5602007248 and 5602007720. The answer should be 56020072485602007720.

Currently, i'm trying converting to str and using strcat then converting back to num, but that doesnt seem to work somehow.

Help really appreciated. Thanks Raj

## Products

No products are associated with this question.

on 26 Nov 2012
Edited by Matt J

### Matt J (view profile)

on 26 Nov 2012
` str2num(sprintf('%d%d',5602007248,5602007720))`

Rajesh

### Rajesh (view profile)

on 26 Nov 2012

Thanks for the help Matt

on 26 Nov 2012

a=10; b=20;

a1=num2str(a);

b1=num2str(b);

c=strcat(a1,b1)

Rajesh

### Rajesh (view profile)

on 26 Nov 2012

sorry the example numbers are 5602007248 and 5602007720... typo in my cooment above...

Muruganandham Subramanian

### Muruganandham Subramanian (view profile)

on 26 Nov 2012

It's working fing fine.. If you stil have a doubt you can compare by ur expected and caluculated by 'strcmp'.I have tried that too..

Rajesh

### Rajesh (view profile)

on 26 Nov 2012

The problem is that when i use num2str for a large number, it rounds the number and the final result wasnt the same, but the solution by Matt works great for large numbers.

Thanks for the response Muruganandham.

### Matt J (view profile)

on 26 Nov 2012
` n=floor(log10(5602007720));`
` 10^(n+1)*5602007248 + 5602007720`

Rajesh

### Rajesh (view profile)

on 26 Nov 2012

Thanks Matt... this one works great too...

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi test