Question

How to implement the collatz sequence in Node.js

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
  
*/
 
function collatz_sequence(n) {
	console.log(n);
  	while (n > 1) {
          if (n % 2 == 0) { // even
              n = n / 2;
          }
          else { // odd
                n = 3 * n + 1;
          }
          console.log(n);
    }
}
 
collatz_sequence(11);
 
 
 
 
/*
run:
 
11
34
17
52
26
13
40
20
10
5
16
8
4
2
1
 
*/

 

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