W2D2 CheckPoint

/* 1. Write a function average that takes two numbers as input (parameters), and returns the average of those numbers. */

var average = function(x , y){
	return (x+y)/2; 
};

/* 2. Write a function greeter that takes a name as an argument and greets that name by returning something along the lines of "Hello, <name>!" */

var greeter = function(name){
	return "Hello, " + name + "!";
};

/* 3. Write the following functions that each accept a single number as an argument:

even: returns true if its argument is even, and false otherwise.
odd: the opposite of the above.
positive: returns true if its argument is positive, and false otherwise.
negative: the opposite of the above. */

var isEven = function(x){
	if(x%2 == 0){
      return true;
    }else{
      return false;
    }
};

var isOdd = function(x){
	if(x%3 == 1){
		return true;
	}else{
		return false;
	}
};

var isPositive = function(x){
	if(x > 0){
		return true;
	}else{
		return false;
	}
};

var isNegative = function(x){
	if(x < 0){
		return true;
	}else{
		return false;
	}
};

/* 4. Write a function sayHello that takes a language parameter, and returns "hello" in that language. Make the function work with at least three languages.*/

var sayHello = function(language){
	switch(language){
		case "Romanian":
			return "Buna Ziua!";
		case "German":
			return "Hallo!";
		case "Spanish":
			return "Hola!";
		default:
			return "Sorry, don't know the greeting in that language";
	}
};

/* 5. Write a function validCredentials that accepts two parameters: username and password, and returns true if both are long enough, and false otherwise. You can decide what constitutes "long enough". */

function validCredentials(username, password){
    if(username.length && password.length == 20){
      return true;
    }else{
      return false;
    }
};

/* 6. Repeating a String n Times: Let's write a function called repeatString that takes two parameters: a string str, which is the string to be repeated, and count -- a number representing how many times the string str should be repeated, e.g.*/

function repeatString(str, count){
	return str.repeat(count);
}