Calculating the sum of two variables in a batch script

Question

This is my first time on Stack Overflow so please be lenient with this question  I have been experimenting with programming with batch and using DOSbox to run them on my linux machine    Here is the code I have been using    echo off set a 3 set b 4 set c  a   b  echo  c  set d  c  1 echo  d    The output of that is    3 4 3 4 1   How would I add the two variables instead of echoing that string

User · Answer

ECHO OFF ECHO Welcome to my calculator  ECHO What is the number you want to insert to find the sum  SET  P Num1  ECHO What is the second number   SET  P Num2  SET  A Ans  Num1   Num2  ECHO The sum is   Ans  PAUSE gt NUL

User · Answer

here is mine  echo Math   ECHO First num   SET  P a   ECHO Second num   SET  P b   set  a s  a   b   echo Result   s

User · Answer

According to this helpful list of operators  an operator can be thought of as a mathematical expression  found here  you can tell the batch compiler that you are manipulating variables instead of fixed numbers by using the    operator instead of the   operator   Hope I Helped

User · Answer

ECHO OFF TITLE Addition ECHO Type the first number you wish to add  SET  P Num1Add  ECHO Type the second number you want to add to the first number  SET  P Num2Add  ECHO  SET  A Ans  Num1Add   Num2Add  ECHO The result is   Ans  ECHO  ECHO Press any key to exit  PAUSE gt NUL

User · Answer

You can solve any equation including adding with this code    echo off  title Richie s Calculator 3 0   main  echo Welcome to Richie s Calculator 3 0  echo Press any key to begin calculating     pause gt nul  echo Enter An Equation  echo Example  1 1  set  p   set  a sum  equation   echo   echo The Answer Is   echo  sum   echo   echo Press any key to return to the main menu  pause gt nul  cls  goto main

User · Answer

You need to use the property  a on the set command   For example    set  a  c  a   b     This allows you to use arithmetic expressions in the set command  rather than simple concatenation   Your code would then be    set a 3  set b 4  set  a  c  a   b   echo  c   set  a  d  c  1  echo  d    and would output   7 8

[batch-file] Calculating the sum of two variables in a batch script

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