Loops

Loops are useful to iterate a given number of times based on a given condition

While loop

while(condition){
  // code
}​

Sample

var amountOfIterations = 10;
var currentIteration = 1;

while (currentIteration <= amountOfIterations){
  console.log("this is the current iteration : " + currentIteration );
  currentIteration++;
}

For loop

for(*start with this* ; *loop if this expression is true * ; *do this after each loop*){
  // code
}​

var amountOfIterations = 10;
for(var currentIteration = 1; currentIteration <= amountOfIterations ; currentIteration++){
  console.log("this is the current iteration : " + currentIteration );
}​

// Other Sample
Array.prototype.countCattle = function(kind) {
    var numKind = 0;
  
  for (var i; i < this.length; i++){
    if (this[i].type == kind ){
        numKind++;
    }
  }
  return numKind;
};