42 lines
1.2 KiB
C#
42 lines
1.2 KiB
C#
string? readResult;
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int startIndex = 0;
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bool goodEntry = false;
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int[] numbers = { 1, 2, 3, 4, 5 };
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// Display the array to the console.
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Console.Clear();
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Console.Write("\n\rThe 'numbers' array contains: { ");
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foreach (int number in numbers) {
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Console.Write($"{number} ");
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}
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// To calculate a sum of array elements,
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// prompt the user for the starting element number.
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Console.WriteLine($"}}\n\r\n\rTo sum values 'n' through 5, enter a value for 'n':");
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while (goodEntry == false) {
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readResult = Console.ReadLine();
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goodEntry = int.TryParse(readResult, out startIndex);
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if (startIndex > 5) {
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goodEntry = false;
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Console.WriteLine("\n\rEnter an integer value between 1 and 5");
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}
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}
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// Display the sum and then pause.
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Console.WriteLine(
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$"\n\rThe sum of numbers {startIndex} through " +
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$"{numbers.Length} is: {SumValues(numbers, startIndex)}"
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);
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Console.WriteLine("press Enter to exit");
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readResult = Console.ReadLine();
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// This method returns the sum of elements n through 5
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static int SumValues(int[] numbers, int n) {
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int sum = 0;
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for (int i = n; i < numbers.Length; i++) {
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sum += numbers[i];
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}
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return sum;
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}
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