CODEWITHSUNDEEP
c#while-loop
user2938026
user2938026

Reputation: 83

C#: How declare a variable to hold a sum and increment this variable each time through a while loop

I'm currently learning C# and I'm trying to find out how declare a variable to hold a sum and increment this variable each time through a while loop. My goal is to ask how many packages the user wants to ship, then get the weight for each package (using a while loop). The issue is how to take the input for each input (however many packages the user has dictated to send) and assign it to a variable without overriding the last entry in the while loop while adding them all together and displaying the combined about as "total".

 static void Main(string[] args)
    {
        Console.WriteLine("Package Shipping Calculator");

        //ask user how many packages they want to ship
        Console.Write("How many packages would you like to ship? ");
        string userinput = Console.ReadLine();
        string userinput2;
        double result;
        double total=0;

        //create loop for weight in lbs that the package weighs. Multiply $2.35 per pound (weight*2.35)
        //for each increment, then add the result
        int counter = 1;

        while (counter <= int.Parse(userinput))
        {
            Console.Write("Please enter the weight of package {0}: ", counter);
            userinput2 = Console.ReadLine();
            result = double.Parse(userinput2) * 2.35;

            counter++;
        }

        counter --;

        Console.Write("\nThe cost to ship {0} packages is {1:C}", counter, total);



        Console.ReadKey();
    }

As you can see, I have the counter going to ask how many times it needs to ask for the weight, but I don't know how to take the amount for each package and add them together inside of the loop. I would greatly appreciate help with this. Thanks in advance.

Upvotes: 3

Views: 879

Answers (4)

user2938026
user2938026

Reputation: 83

Thanks to the great recommendations combined, I was able to find the answer to my question. I changed result = double.Parse(userinput2) * 2.35; to result += double.Parse(userinput2) * 2.35; and then declared my variable result=0 as before it was not assigned a value. I removed total from my final Write line as the method I changed to no longer needed it.

Upvotes: 0

Armin
Armin

Reputation: 232

In you code add

total = total + result;

right after

result = double.Parse(userinput2) * 2.35;

Upvotes: 1

Wes
Wes

Reputation: 31

I have to say, you're really close. The only thing I could suggest is that you add the previous amount of result to itself each time it's goes through it's loop. Such as 

while (counter <= int.Parse(userinput))
    {
        Console.Write("Please enter the weight of package {0}: ", counter);
        userinput2 = Console.ReadLine();
        result = (double.Parse(userinput2) * 2.35) + result;

        counter++;
    }

You should not have a problem with this as you've already declared result above as 0

Upvotes: 1

B. Witter
B. Witter

Reputation: 644

Ah! Took me a sec to figure out the problem because it was so small! you need to change result = double.Parse(userinput2) * 2.35; to result += double.Parse(userinput2) * 2.35;

Upvotes: 2

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