﻿ C# Sharp exercises: Compute the sum of the first 500 prime numbers - w3resource

# C# Sharp Exercises: Compute the sum of the first 500 prime numbers

## C# Sharp Basic: Exercise-26 with Solution

Write a C# program to compute the sum of the first 500 prime numbers.

Sample Solution:-

C# Sharp Code:

``````using System;
public class Exercise26
{
public static void Main()
{
Console.WriteLine("\nSum of the first 500 prime numbers: ");
long sum = 0;
int ctr = 0;
int n = 2;
while (ctr < 500)
{
if (isPrime(n))
{
sum += n;
ctr++;
}
n++;
}

Console.WriteLine(sum.ToString());

}
public static bool isPrime(int n)
{
int x = (int)Math.Floor(Math.Sqrt(n));

if (n == 1) return false;
if (n == 2) return true;

for (int i = 2; i <= x; ++i)
{
if (n % i == 0) return false;
}

return true;
}
}
``````

Sample Output:

```Sum of the first 500 prime numbers:
824693
```

Flowchart:

C# Sharp Code Editor:

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