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Summation of a character

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Edward Huang
Edward Huang on 20 Jun 2019
Edited: Stephen on 20 Jun 2019
I was working on Cody Problem 74 where I found examples like:
sum('13') = 100
sum('22') = 100
sum('123456') = 309
I wonder how it works here, i.e., sums a character but returns a double.
Thanks in advance.

Accepted Answer

Stephen on 20 Jun 2019
Edited: Stephen on 20 Jun 2019
Take a look at the character codes, e.g.:
>> double('13')
ans =
49 51
The function sum simply sums up the character codes:

More Answers (1)

KSSV on 20 Jun 2019
Read about uint16. This will convert the characters into numeric codes. When you use sum on the characters, they will be converted to uint16 numbers and gets summed up. Check below code.
a = uint16('13') ;
b = uint16('22') ;
c = uint16('123456') ;
In the above sum(a) and sum('13') are same.

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