Calculate Pi Value from random numbers

get-pi-using-gcd.js

function getPi(){
    function getRand(maxRand){
        return Math.floor(Math.random()*maxRand);
    }
    function gcd(a,b) {
        if (!b) return a;
        else return gcd(b,a%b);
    };
    let coPrimes = 0;
    const iterations = 10000000;
    const maxRand = 10000000;
    for (var i = 0; i < iterations; i++) {
        const n1 = getRand(maxRand);
        const n2 = getRand(maxRand);
        if(gcd(n1,n2) === 1) coPrimes++;
    }
    const proportion = coPrimes/iterations;
    const result = Math.sqrt(6/proportion);
    console.log(result);
    return result;
}

// details: https://www.youtube.com/watch?v=RZBhSi_PwHU

get-pi-using-monte-carlo.js

function getPi() {
    function getRandAxis(){
        return (Math.random()*2) - 1;
    }
    function isInside(a,b){
        if((a*a) + (b*b) <= 1) return true;
        else return false;
    }
    let inside = 0;
    const iterations = 10000000;
    for (var i = 0; i < iterations; i++) {
        if(isInside(getRandAxis(),getRandAxis())) inside++;
    }
    const result = 4*(inside/iterations);
    console.log(result);
    return result;
}

// details: https://www.youtube.com/watch?v=VJTFfIqO4TU
// code ported from c++ https://repl.it/GTlL/0
// credits for the c++ code goes to https://github.com/antwankakki