If

The easiest condition is an if statement and its syntax is if(condition){ do this … }. The condition has to be true for the code inside the curly braces to be executed. You can for example test a string and set the value of another string dependent on its value:

var country = "France";
var weather;
var food;
var currency;

if (country === "England") {
  weather = "horrible";
  food = "filling";
  currency = "pound sterling";
}

if (country === "France") {
  weather = "nice";
  food = "stunning, but hardly ever vegetarian";
  currency = "funny, small and colourful";
}

if (country === "Germany") {
  weather = "average";
  food = "wurst thing ever";
  currency = "funny, small and colourful";
}

var message =
  "this is " +
  country +
  ", the weather is " +
  weather +
  ", the food is " +
  food +
  " and the " +
  "currency is " +
  currency;

Note: Conditions can also be nested.