If i add 2 double data type value, the result is round off and print.How do i get the exact output in double?

Question

I need to add double values and display it result. But the resulting value was wrong.

class Program
{
    static void Main(string[] args)
    {
        int i = 4;
        double d = 4.0;
        string s = "HackerRank ";
        int i1 = 12;
        double d1 = 4.0;
        string s1 = "is the best place to learn and practice coding!";
        int sum = 0; string s2 = string.Empty;
        sum = sum+i + i1;
        s2 = s2 + s + s1;
        Console.WriteLine(sum);
        Console.WriteLine("{0}+{1}={2}",d,d1,(d+d1).ToString());
        Console.WriteLine(s2);
        Console.ReadLine();
    }
}

the output snapshot is here

My expected output is 4.0+4.0=8.0

But the output value is roundoff. Can anyone provide the reason and solution for this question?

Answer 1

if you want to show the output in x.xx format you can use:

Console.WriteLine("{0:F2}+{1:F2}={2:F2}",d,d1,d+d1);