Precision in C# without Parenthesis

[Arash_89]

Hello,


We have Precision in result when we don't use parenthesis.




We don't have precision in result when we use parentheses.








In two cases we have divided an integer by double (1/fraction) but we have different result.


static void Main(string[] args)
{
Console.WriteLine("Number??");
int number = Int32.Parse(Console.ReadLine());
double sum = 0;
for (int i = 1; i <= number; i++)
{
sum += 1.0 / (Math.Sqrt(i) + Math.Sqrt(i + 1)); // and sum += 1.0 / Math.Sqrt(i) + Math.Sqrt(i + 1);
}
Console.WriteLine(sum);

}

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