functionsExerciseAnswers

/**
 * Exercise 0: angryGandalf (example)
**/
 
// Define angryGandalf with input parameters
var angryGandalf = function(type) {
 
	// Define the variables needed
	var message;
 
	// Run conditional on type for 'grey' and 'white'
	if (type === 'grey') {
		message = "YOU...SHALL NOT... PASS!";
	} else if (type === 'white') {
		message = "You merely passed me to your demise.";
	} else {
		message = "I don't think I'm Gandalf anymore.";
	}
 
	// Return message
	return message 
 
}
 
// console.log(angryGandalf('grey'));  // Expect "YOU...SHALL NOT... PASS!" 
// console.log(angryGandalf('white')); // Expect "You merely passed me to your demise."
// console.log(angryGandalf(2)); // Expect "I don't think I'm Gandalf anymore."
 
 
/**
 * Exercise 1: tellFortune
**/
 
// Create function with name tellFortune and appropriate parameters
var tellFortune = function(job,location,partner,children) {
	// takes 4 arguments: number of children, partner's name, geographic location, job title.
 
	// Define string variable that will have that output
	var fortune = "You will be a " + job + " in " + location + ", and married to " + partner + " with " + children + " kids."
	
	// console.log(fortune);
 
	// Return that string
	return fortune;
};
 
// console.log(tellFortune('bball player', 'spain', 'Shaq', 3)); // Expect 'You will be a bball player in spain and married to Shaq  with 3 kids. '
// console.log(tellFortune('stunt double', 'Japan', 'Ryan Gosling', 3000)); // Expect 'You will be a stunt double in Japan and married to Ryan Gosling  with 3000 kids. '
// console.log(tellFortune('Elvis impersonator', 'Russia', 'The Oatmeal', 0)); // You will be a Elvis impersonator in Russia and married to The Oatmeal  with 0 kids. 
 
 
 
/**
 * Exercise 2: calculateAge
**/
 
// Create function with name calculateAge and appropriate parameters
var calculateAge = function(birthYear, currentYear) {

	// Define number variable age and save the age based on the years given, ie 2010-1990 = '20'
    var age = currentYear - birthYear;
    
    // return string that says 'You are either XX or YY'
    console.log('You are either ' + age + ' or ' + (age - 1));

}
 
 
// console.log(calculateAge(1984, 2012)); // You are either 28 or 27 
// console.log(calculateAge(1988, 2012)); // You are either 24 or 23 
// console.log(calculateAge(1982, 2012)); // You are either 30 or 29 
 
 
 
/**
 * Exercise 3: calculateSupply
**/

var calculateSupply = function(age, numPerDay) {

  var maxAge = 100;

  var totalNeeded = (numPerDay * 365) * (maxAge - age);

  var message = 'You will need ' + totalNeeded + ' cups of tea to last you until the ripe old age of ' + maxAge;
  console.log(message);
} 

// console.log(calculateSupply(28, 36)); // You will need 946080 cups of tea to last you until the ripe old age of 100
// console.log(calculateSupply(28, 2.5)); // You will need 65700 cups of tea to last you until the ripe old age of 100
// console.log(calculateSupply(28, 400));  // You will need 10512000 cups of tea to last you until the ripe old age of 100 

/**
 * Exercise 4: The Circle Calculator
**/
 
// Create function with name calcDiameterFromRadius and appropriate parameters
var calcDiameterFromRadius = function(radius) {
	return radius * 2;
} 
 
// Create function with name calcCircumfrence and appropriate parameters
var calcCircumfrence  = function(radius) {
	var diameter = calcDiameterFromRadius(radius);

	return diameter * Math.PI
} 
 
// console.log(calcCircumfrence(3)); // The circumference is 18.84
// console.log(calcCircumfrence(4)); // The circumference is 25.12
// console.log(calcCircumfrence(5)); // The circumference is 31.4
 
 
/**
 * Exercise 5:  The Temperature Converter
**/
 
// Create a function called convertTemp:
// Give it 2 parameters, the first being number, second being inputType. inputType should accept strings 'F' or 'C'
	var convertTemp = function(number, inputType) {
		
		var convertedNumber;

		if(inputType === 'C') {
			convertedNumber = number * (9/5) + 32;
		} else if (inputType === 'F') {
			convertedNumber = (number - 32) * (5/9);
		} else {
			alert('bad input type');
		}

		// Return that number
		return convertedNumber;

	};

// Create a function called celciusWaterState. This function will tell you if a Celsius temperature is boiling, liquid, or freezing:
// Give it 1 parameter thats a number
	var waterState = function(number, inputType) {

		// Define a variable that will save the string of the conditional below
		var waterState,
			boilingNumber,
			freezingNumber;

		if (inputType === 'F') {
			boilingNumber = 212;
			freezingNumber = 32;
		} else if (inputType === 'C') {
			boilingNumber = 100;
			freezingNumber = 0;
		}

		// Write a conditional if then statement that saves 'boiling', 'liquid', or 'freezing' depending on what the temperature is.
		if (number < boilingNumber && number > freezingNumber) {
			waterState = 'liquid';
		} else if (number >= boilingNumber) {
			waterState = 'gas';
		} else if (number <= freezingNumber) {
			waterState = 'freezing';
		}

		// Return that number
		return waterState;

	};

// Create function with name waterTempAndState
// Give it 2 parameters, the first being number, second being inputType. inputType should accept strings 'F' or 'C'
	var waterTempAndState = function(number, inputType) {

	    var state,
	    	degreeName,
	    	convertedNumber;

    	state = waterState(number, inputType);

	    if (inputType === 'C') {
	    	degreeName = 'Celsius';
	    } else if (inputType === 'F') {
	    	degreeName = 'Fahrenheit';
	    }

	    return "It's currently " + number + " degrees in the " + degreeName + " standard and water is in a " + state  + " state."

	};
    
// console.log(convertTemp(32, 'F')); // 0
// console.log(convertTemp(100, 'C')); // 212

// console.log(celciusWaterState(0)); // 'freezing'
// console.log(celciusWaterState(1)); // 'liquid'
// console.log(celciusWaterState(99.99)); // 'liquid'
// console.log(celciusWaterState(100)); // 'boiling'

console.log(waterTempAndState(0, 'C')); // "It's currently 50 degrees in the Celcius standard and water is liquid. "
console.log(waterTempAndState(213, 'F')); // "It's currently 213 degrees in the Farenheit standard and water is boiling. "
console.log(waterTempAndState(-1, 'F')); // "It's currently -1 degrees in the Farenheit standard and water is liquid. "