Structures allow us to combine several variables to create a new data type. Some other languages support the same concept but call it “records”. If you come from object-oriented programming you can think about them as classes without methods.

Declaration

A structure is declared by the keyword struct followed by the name of the new structure and a list of its members enclosed in parentheses:

struct s {
    char a;
    int b;
    double c;
    char d[10];
};

Here we declared a new structure with the name s that has the members a (a single character), b (an integer), c (a double), and d (a char array of size 10 which can store up to 9 characters and a terminating null character).