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  1. PO
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    <p>You need to loop while your sum of 100 isn't achieved, so the condition is <code>inputList.Sum() &lt; 100</code>. </p> <p>If the sum and new number is greater than 100, you tell the user. If it's not the case, then you can add them together.</p> <p>Also, you should query the user for an <code>int</code>, unless you really need a decimal number (if it's the case you'll need to check the equality with an epsilon, decimals and 'exactly equal' do not fit together well).</p> <p>This gives the following :</p> <pre><code>static void Main(string[] args) { List&lt;int&gt; inputList = new List&lt;int&gt;(); do { Console.Write("Enter your number: "); int numberToAdd = Convert.ToInt32(Console.ReadLine()); if (numberToAdd + inputList.Sum() &gt; 100) { Console.WriteLine("Number will not be added, {0} is greater than 100", numberToAdd + inputList.Sum()); } else { inputList.Add(numberToAdd); } } while (inputList.Sum() &lt; 100); double sum = inputList.Sum(); Console.WriteLine("The sum is " + sum); double avg = sum / inputList.Count; Console.WriteLine("The average is " + avg); Console.ReadLine(); } </code></pre> <hr> <p>Once cleaned a bit :</p> <pre><code> static void Main(string[] args) { List&lt;int&gt; inputList = AskUserForInput(); PrintSum(inputList); PrintAverage(inputList); Console.ReadLine(); } private static List&lt;int&gt; AskUserForInput() { List&lt;int&gt; inputList = new List&lt;int&gt;(); do { Console.Write("Enter your number: "); int numberToAdd = Convert.ToInt32(Console.ReadLine()); if (IsGreaterThan100(numberToAdd, inputList)) { Console.WriteLine("Number will not be added, {0} is greater than 100", numberToAdd + inputList.Sum()); } else { inputList.Add(numberToAdd); } } while (IsSumLowerThan100(inputList)); return inputList; } private static bool IsGreaterThan100(int numberToAdd, List&lt;int&gt; inputList) { return numberToAdd + inputList.Sum() &gt; 100; } private static bool IsSumLowerThan100(List&lt;int&gt; inputList) { return inputList.Sum() &lt; 100; } private static void PrintAverage(List&lt;int&gt; inputList) { double avg = inputList.Sum() / inputList.Count; Console.WriteLine("The average is " + avg); } private static void PrintSum(List&lt;int&gt; inputList) { double sum = inputList.Sum(); Console.WriteLine("The sum is " + sum); } } </code></pre>
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    1. POHow do I loop until array list quota is met
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    1. USPierre-Luc Pineault
    1. USPierre-Luc Pineault
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    1. COThis uses Integer when I need it to be a double.
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    2. COAs I said, you can very easily switch to double but you'll need to use an epsilon for the equality checks, because you're playing with fractions (1 + 2 can equal 3.000001 instead of 3)
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      1. USPierre-Luc Pineault
    3. COI have no clue what epsilon checks are. Any chance I can do floats without that? I just need to use floating point numbers for this.
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