This program is about asking a range of integers and then it gives you the sum of the numbers in that range.
For example, the sum from 3 to 6 would be 3 + 4 + 5 + 6 = 18.
Even it was not hard at all, I was having trouble because I had little mistakes that I didn´t noticed at first.
Then the program was working, but the sum of the numbers was wrong so I changed again and finally it work correctly.
This program was about using a simple do – while so it can keep making sum until de first number its equal to the second one.
Here you can see my code: Sum of numbers.
And this is a picture of my program working. Notice that at first you can see the wrong sum of the numbers that I changed at the end. 
Martika's Blog 
No sé que lenguaje de programación es, (yo llevo python) pero en la parte de «num1=num1+1» lo puedes escribir como num1+=1 siempre que se ponga un «+», «-» ,»*» ,después del nombre de esa variable y en seguida el «=» (num1*=x ó num1+=1 ó num1-=1) lo que hará será incluirse en la operacion y sumarle, restarle, multiplicarle lo que hayas puesto después del signo igual. Probablemente sea C? yo lleve C#, supongo que ha de ser algo similar, yo creo que aplica para cualquier lenguaje (espero) (:
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