You are given two int variables j and k, an int array zipcodelist that has been declared and initialized, and an boolean variable duplicates. write some code that assigns true to duplicates if any two elements in the array have the same value, and that assigns false to duplicates otherwise. use only j, k, zipcodelist, and duplicates.

Final answer:

The code uses nested loops to check for duplicates in the integer array, setting the boolean variable 'duplicates' to true if any are found.

Explanation:

To determine if there are duplicates in an integer array, you can use a nested loop structure, iterating through the array with two different variables. Here's a piece of code that does this, using the variables j, k, zipcodelist, and duplicates:

duplicates = false;
for (j = 0; j < zipcodelist.length; j++) {
   for (k = j + 1; k < zipcodelist.length; k++) {
       if (zipcodelist[j] == zipcodelist[k]) {
           duplicates = true;
           break;
       }
   }
   if (duplicates) {
       break;
   }
}

This code initializes duplicates to false. It then uses a nested loop where the variable j is the index for the current element, and the variable k is the index for the following elements to check. If a duplicate is found (when two elements have the same value), duplicates is set to true and the loops are exited using break statements.

Final answer:

To check for duplicates in an array, use nested loops to compare each element with every other element.

Explanation:

One way to check if there are any duplicates in the zipcodelist array is by using nested loops. First, you set the initial value of duplicates to false. Then, iterate over each element in the array using the outer loop with the variable j. Within this loop, use another loop with the variable k to compare each element with every other element in the array. If you find two elements that have the same value, set duplicates to true and break out of the loops.

Here is the code:

This code checks every pair of elements in the array for duplicates, and if it finds any, it sets the duplicates variable to true. If no duplicates are found, the duplicates variable remains false.

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