Question

(JAVA) How do I access the values calculated in a for loop after the for loop is finished iterating?

My task is to calculate subtotals using values from the user dependent on how many items they are buying. I used a nested for loop with if loops to calculate the subtotals based on what the price is (user input) and quantity of items (user input). I was able to get the loop to run how I need to; however, after the for loop I am tasked to add all of the subtotals that the for loop generated together for a final subtotal. I am unsure of how to store the values from the for loop to access and add them all together at the end. Thank you very much for any help.

Answer 1

Answer:

You can use an array to store the values/outputs of the for loop, to be used later in the program as shown below:

public class HelloWorld{

     public static void main(String []args){
    //create an array to store outputs of the for loop
            int[] subtotals = new int[10];
            int p = 0; //just for illustration
            int n = 1; //just for illustration
            int subtotal = 0;
            int total = 0;
            System.out.println("Subtotals");
             for(int i=0;i<10;i++){
                subtotal = n+p;
                System.out.println(subtotal);
                //putting the outputs/values in an array
                subtotals[i]= subtotal;
                p++;
                n++;
             }
             /*The computation values of the first for loop was stored in array
              , which can be access later.
             */
             for(int j=0;j<10;j++){
                total += subtotals[j];
             }

    //print the total of subtotals
     System.out.println("Total = "+total);
  
    }
}

Sample run:

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