function calculateSavings(income, expenses) {
  var totalSpent = 0;
  for (var i = 0; i < expenses.length; i++) {
    totalSpent = totalSpent + expenses[i];
  }
  var savings = income - totalSpent;
  if (savings < 0) {
    return "Over budget by $" + Math.abs(savings);
  } else {
    return "You saved $" + savings;
  }
}

// --- Main Program ---
var income = parseFloat(prompt("Enter your monthly income:"));
var expenses = [];
var num = parseInt(prompt("How many expenses?"));
for (var i = 0; i < num; i++) {
  var amt = parseFloat(prompt("Enter expense amount:"));
  expenses.push(amt);
}

var result = calculateSavings(income, expenses);
console.log(result);

function runQuiz(questions, answers) {
  var score = 0;
  for (var i = 0; i < questions.length; i++) {
    var userAnswer = prompt(questions[i]);
    if (userAnswer.toLowerCase() == answers[i].toLowerCase()) {
      console.log("Correct!");
      score = score + 1;
    } else {
      console.log("Wrong. Answer: " + answers[i]);
    }
  }
  return score;
}

// --- Main Program ---
var questions = [
  "What does CPU stand for?",
  "What number system do computers use?",
  "What does HTML stand for?"
];
var answers = [
  "Central Processing Unit",
  "Binary",
  "HyperText Markup Language"
];

var finalScore = runQuiz(questions, answers);
console.log("You got " + finalScore + "/" + questions.length);

function recommendClothing(temp, condition, clothingList) {
  var recommendations = [];
  for (var i = 0; i < clothingList.length; i++) {
    var item = clothingList[i];
    if (temp < 40 && item.warmth == "heavy") {
      recommendations.push(item.name);
    } else if (temp >= 40 && temp < 70 &&
               item.warmth == "medium") {
      recommendations.push(item.name);
    } else if (temp >= 70 && item.warmth == "light") {
      recommendations.push(item.name);
    }
  }
  if (condition == "rainy") {
    recommendations.push("Umbrella");
  }
  return recommendations;
}

// --- Main Program ---
var clothing = [
  {name: "Winter Coat", warmth: "heavy"},
  {name: "Hoodie", warmth: "medium"},
  {name: "T-shirt", warmth: "light"},
  {name: "Scarf", warmth: "heavy"},
  {name: "Light Jacket", warmth: "medium"},
  {name: "Shorts", warmth: "light"}
];

var temp = parseInt(prompt("Current temperature (F):"));
var condition = prompt("Weather (sunny/rainy/cloudy):");
var result = recommendClothing(temp, condition, clothing);
console.log("Wear: " + result.join(", "));

function analyzeGrades(gradeList) {
  var total = 0;
  var highest = gradeList[0];
  var lowest = gradeList[0];
  for (var i = 0; i < gradeList.length; i++) {
    total = total + gradeList[i];
    if (gradeList[i] > highest) {
      highest = gradeList[i];
    }
    if (gradeList[i] < lowest) {
      lowest = gradeList[i];
    }
  }
  var average = total / gradeList.length;
  var letter;
  if (average >= 90) { letter = "A"; }
  else if (average >= 80) { letter = "B"; }
  else if (average >= 70) { letter = "C"; }
  else if (average >= 60) { letter = "D"; }
  else { letter = "F"; }
  return average + " (" + letter + ") | High: "
    + highest + " Low: " + lowest;
}

// --- Main Program ---
var grades = [];
var num = parseInt(prompt("How many grades?"));
for (var i = 0; i < num; i++) {
  var g = parseFloat(prompt("Enter grade:"));
  grades.push(g);
}

console.log(analyzeGrades(grades));

function analyzeSteps(stepList, dailyGoal) {
  var daysMetGoal = 0;
  var totalSteps = 0;
  for (var i = 0; i < stepList.length; i++) {
    totalSteps = totalSteps + stepList[i];
    if (stepList[i] >= dailyGoal) {
      console.log("Day " + (i + 1) + ": " +
        stepList[i] + " - Goal met!");
      daysMetGoal = daysMetGoal + 1;
    } else {
      console.log("Day " + (i + 1) + ": " +
        stepList[i] + " - Below goal");
    }
  }
  var pct = (daysMetGoal / stepList.length) * 100;
  return daysMetGoal + "/" + stepList.length +
    " days (" + pct + "%)";
}

// --- Main Program ---
var steps = [];
var goal = parseInt(prompt("Enter daily step goal:"));
var days = parseInt(prompt("How many days to log?"));
for (var i = 0; i < days; i++) {
  var s = parseInt(prompt("Steps for day " + (i+1) + ":"));
  steps.push(s);
}

var summary = analyzeSteps(steps, goal);
console.log("Summary: " + summary);