Condition 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:

  1. var country = "France";
  2. var weather;
  3. var food;
  4. var currency;
  6. if (country === "England") {
  7.   weather = "horrible";
  8.   food = "filling";
  9.   currency = "pound sterling";
  10. }
  12. if (country === "France") {
  13.   weather = "nice";
  14.   food = "stunning, but hardly ever vegetarian";
  15.   currency = "funny, small and colourful";
  16. }
  18. if (country === "Germany") {
  19.   weather = "average";
  20.   food = "wurst thing ever";
  21.   currency = "funny, small and colourful";
  22. }
  24. var message =
  25.   "this is " +
  26.   country +
  27.   ", the weather is " +
  28.   weather +
  29.   ", the food is " +
  30.   food +
  31.   " and the " +
  32.   "currency is " +
  33.   currency;

Note: Conditions can also be nested.

{% exercise %} Fill up the value of name to validate the condition. {% initial %} var name =

if (name === “John”) {

} {% solution %} var name = “John”;

if (name === “John”) {

} {% validation %} assert(name === “John”); {% endexercise %}