public void averageInput() {
	BufferedReader stdin = new BufferedReader(new InputStreamReader(
	                                                System.in));
	System.out.print("How many values do you want to enter? ");
	int numValues = Integer.parseInt(stdin.readLine());

	// make sure the user enters a non-negative number of values
	while (numValues < 0) {
		System.out.print("Please enter a non-negative number of values: ");
		numValues = Integer.parseInt(stdin.readLine());
	}

	// prompt for the values, computing the sum as we go
	double sum = 0.0;
	for (int i = 0; i < numValues; i++) {
		System.out.print("Enter value " + (i + 1) + ": ");
		sum += Integer.parseInt(stdin.readLine());
	}

	// calculate and report the average
	if (numValues == 0)                          // avoid dividing by 0
		System.out.println("No values to average");
	else
		System.out.println("The average is " + sum/numValues);
} // end method averageInput

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