Now that we know how to define structures, let’s take a look at how we can use them in our code.

struct Bottle {
  char* name;
  int maxCapacity;
  int currentCapacity;
};

struct Bottle bottle1 = {"superBottle", 24, 0};

The above example defines the struct Bottle from the last exercise. The last line of the code then initializes a struct using an ordered notation:

• The struct keyword - once again
• The user-defined struct type, Bottle
• The name of the structure variable, bottle1
• The member variable value assignments within a set of curly braces, {}

The order of values assigned to the member variables match the order in which the variables were defined in the structure.

If you wish to be more specific with your initialization and not worry about putting elements in the right order you can do it using an unordered notation:

struct Bottle bottle1 = {
  .maxCapacity = 24,
  .name = "superBottle",
  .currentCapacity = 0
};

Once initialized structures allow you to work with complex data types in a more cohesive and efficient manner.