How to add numbers without using "+" sign?

write a function which takes two inputs and returns the sum. Matlab inbuilt function are not allowed, you can only use for,if and while loop if necessary.

Answer 1

[Image Analyst]

I think the intent is that you can't use the sum() function and the length() or size() functions, not that you can't use mathematical operators like +.

So you can have a for loop to add the vectors. Since you can't use the length() or size() function, it's hard to know when to quit adding elements. I'd use a try catch inside the for loop. It will go to the catch when you try to index beyond the length of the array. In the catch, have a "break" command to exit the loop. Don't use sum as the name of your accumulator variable since it's the name of a built in function.

See this link: http://www.mathworks.com/matlabcentral/answers/38787-what-can-be-programmed-without-any-built-in-functions