User-Defined Structure Types:

A structure is a user-defined data type that allows a programmer to group
related data items of different data types under a single name. Structures are
used to represent real-world entities that have multiple attributes.

Each member of a structure is accessed using the dot (.) operator. Structure
definitions create a template that can be used to declare multiple structure
variables. Structures improve program organization by logically grouping related
data.

SYNTAX:

struct tin{
    int id;
    float weight;
    char brand;
};

EXAMPLE:

#include <stdio.h>

struct tin{
    int id;
    float weight;
    char brand;
};

int main() {
    struct tin t1= {37846,56.7799,'C'};
    printf("%d\n",t1.id);
    printf("%.2f\n",t1.weight);
    printf("%c",t1.brand);
   
    return 0;
}