using System;

namespace RecursionIteration

{

class Program

{

static void Main(string[] args)

{

int a=5;

Console.WriteLine($"Recursion Method: {RecursionMethod(a)}");

Console.WriteLine($"Iteration Methos: {IterationMethod(a)}");

// Recursion method include iteration method, but iteration just iteration no recursion involved.

}

// Recursion Method

static int RecursionMethod(int n)

{

if(n>=1)

{

return n+RecursionMethod(n-1);

}

else{

return 0;

}

}

// Iteration Method

static int IterationMethod(int n)

{

int s=0;

for(int i=0;i<=n;i++)

{

s+=i;

}

return s;

}

}

}