Question

How to calculate the Collatz sequence starting with 13 in JavaScript

Answer 1

function CalcCollatz(x) {
    if ((x & 1) != 0) {
        return x * 3 + 1;
    }
    return x / 2;
}

function PrintCollatzSequence(x) {
    console.log(x);
    
    while (x != 1) {
        x = CalcCollatz(x);
        console.log(x);
    }
}

const x = 13;

PrintCollatzSequence(x);




/*
run:

13
40 
20 
10 
5 
16 
8 
4 
2 
1 

*/

 

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