Question

How to implement the collatz sequence in C#

Answer 1

/*
 
- The sequence begins with a positive integer: n
- If n is odd, the next number is: 3n+1
- If n is even, the next number is: n/2
- The sequence ends with: 1
 
*/

using System;

class Program
{
    static void collatz_sequence(int n) {
        Console.Write(n + " ");
        while (n > 1) {
            if (n % 2 == 0) { // even
                n = n / 2;
            }
            else { // odd
                n = 3 * n + 1;
            }
            Console.Write(n + " ");
        }
    }

    static void Main() {
        collatz_sequence(7);
    }
}




/*
run:

7 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1 

*/

 

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