Monte Carlo Experiment

coins.js

var startTime = Date.now();

var trials = 10000000;

var numQuarters = 8;
var quarterDelta = 6.667;

var quarterRadius = 1.213;
var dimeRadius = 0.895;

var hit = 0;
var quarterLocations = [];

for(var j = 0; j < numQuarters; j++) {
  quarterLocations.push(j * quarterDelta);
}

for(var i = 0; i < trials; i++) {
  var startPoint = Math.random() * 60;
  var dimeL = startPoint - dimeRadius;
  var dimeR = startPoint + dimeRadius;

  for(var k = 0; k < numQuarters; k++) {
    var quarterL = quarterLocations[k] - quarterRadius;
    var quarterR = quarterLocations[k] + quarterRadius;

    if (dimeR >= quarterL && dimeR <= quarterR) {
      hit+=1;
      continue;
    }

    if (dimeL >= quarterL && dimeL <= quarterR) {
      hit+=1;
      continue;
    }
  }
}

var runTime = Date.now() -startTime;
var misses = trials - hit;

console.log("There were " + hit + " hits and " + misses + " misses.");
console.log("Ran in " + runTime + "ms");