Can someone help me how to add 2 hexadecimal numbers?

I have ha and a as string, and I want to add 2 hexadecimal numbers.

ha = '6a09e667f3bcc908'

fn_bin2hex(a) = '73a54f399fa4b1b2'

Can someone help me how to add 2 hexadecimal numbers?

I tryed hex2dec and add 2 number,, but it doesn't work because these numbers are too big.

Is there a correct way to do this?

[KSSV]

How about hex2num?

hab = num2hex(hex2num(ha)+hex2num(hb)) ;

[Walter Roberson]

hex2num() is limited to double, and so cannot be used with values greater than 0x20000000000000

Answer 1

[Ameer Hamza]

If you have symbolic toolbox, then define a function like this

hexsum = @(a, b) dec2hex(sum(str2sym({['0X' a], ['0X' b]})));

Example

ha = '6a09e667f3bcc908';
hb = '73a54f399fa4b1b2';
hc = hexsum(ha, hb);

Result

>> hc
hc =
    'DDAF35A193617ABA'

[Younghun Kim]

I appreciate what you did. Thank you!

[Ameer Hamza]

I am glad to be of help!!!

[Younghun Kim]

I'm sorry to say this, but there's a problem.

I did addition another 2 num.

'3c6ef372fe94f82b' + 'd67806db8b148677'

ans =

'112E6FA4E89A97EA2'

I think it has to be '12e6fa4e89a97ea2'

Why is one bit stuck in front? I don't know why...... :(

[Walter Roberson]

'112E6FA4E89A97EA2' is correct, and your expectation of '12e6fa4e89a97ea2' is incorrect.

Look at the top nibble: you are adding 3 + d, which is 3 + 13, and that is going to overflow. Therefore the result must have one more digit than the inputs, 17 output digits when the inputs are 16 digits each.