var forLoop = function() {
    for(var i = 10; i >= 0; i -= 2) {
        console.log(i);
    }
};
forLoop();

 var whileLoop = function() {
     var whileCondition = 10
     while(whileCondition >= 0) {
         console.log(whileCondition);
         whileCondition -= 2
     }
 };
 whileLoop();

 var doLoop = function() {
     doCondition = false
     do {
         console.log("Apparently I'm never going to have to use this.");
     } while(doCondition === true);
 };
 doLoop();