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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Previous: Write a C# program to print the odd numbers from 1 to 99. Prints one number per line.
Next: Write a C# program and compute the sum of the digits of an integer.
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