How can I sum two numbers in Latex with my own command?

Question

I have to sum two numbers (integers) in LaTeX. I also have to "print" the process of sum. So it would look like 5+2=7 in text. Any ideas? My code so far:

\newcommand{\Sum}
{\newcounter{cnt}
\setcountter{cnt}{1+1}
}

Answer 1

In LaTeX, first you have to define a counter with:

\newcounter{countername}

Then you can put a value in this counter with:

\setcounter{countername}{<value>}

where <value> is an integer. Or you can add one to this counter with:

\stepcounter{countername}

or you can add some arbitrary value to this counter with:

\addtocounter{countername}{<value>}

---

Then, to access this counter you use:

\value{countername}

so you can, for example, make calculations with this counter:

\setcounter{anothercounter}{%
  \numexpr\value{countername}+10\relax%
}

Then, when you need to print the value of this counter to the pdf file, you can you the mighty \the:

\the\value{countername}

or you can use one of these:

\arabic{countername}
\roman{countername}
\Roman{countername}
\alph{countername}
\Alph{countername}