What are the advantages of unions?

The basic advantage is that union will use the memory space of the datatype which has the highest memory.... hence memory consumption will be less...But when u use structure the total memory will be the sum of the memory of all datatypes.. ie.(higher memory allocation)Disadvantage is that..... when you use the union.... only the last entered variable can be directly accessed as only the last added data to the union will exist in the memory.

Rahul Prajapat

9y

1

The basic advantage is that union will use the memory space of the datatype which has the highest memory.... hence memory consumption will be less...But when u use structure the total memory will be the sum of the memory of all datatypes.. ie.(higher memory allocation)Disadvantage is that..... when you use the union.... only the last entered variable can be directly accessed as only the last added data to the union will exist in the memory...

Munesh Sharma

9y

0

1) occupy less memory 2) Convert one datatype to another Consider examples, Suppose we are developing a application for calulator then we will save our data into byte format.Another example is graphics library in C language

Rupesh Kahane

10y

0

Union is a collection of data items of different data types. It can hold data of only one member at a time though it

has members of different data types. If a union has two members of different data types, they are allocated the

same memory. The memory allocated is equal to maximum size of the members. The data is interpreted in bytes

depending on which member is being accessed.

Example:

union pen {

char name;

float point;

};

Here name and point are union members. Out of these two variables, 'point' is larger variable which is of float

data type and it would need 4 bytes of memory. Therefore 4 bytes space is allocated for both the variables. Both

the variables have the same memory location. They are accessed according to their type. Union is efficient when

members of it are not required to be accessed at the same time.

Tripti Tiwari

11y

0