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@rustyconover
Created May 5, 2015 21:44
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Collatz sequence in Javascript
'use strict';
function collatz_count_until_1(n) {
var count = 0;
while(n !== 1) {
if(n % 2 === 0) {
n /= 2;
} else {
n = (3 * n) + 1;
}
count++;
}
return count;
}
var max;
for(var i = 1; i < 300000; i++) {
var l = collatz_count_until_1(i);
if(max === undefined || max[0] < l) {
max = [l, i]
}
}
console.log("Maximum stopping distance %d, starting number %d", max[0], max[1]);
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