What is the difference between structures and unions in C programming?

What is the difference between structures and unions in C programming?

In C, a structure allows you to store different data types together, while a union lets you store different data types in the same memory location.

Can you give me an example of when to use a structure?

Sure! Use a structure when you need to group related data, like a 'Person' with a name, age, and height.

And when would I use a union?

Use a union when you want to save memory and only need to store one of several data types at a time, like a 'Data' type that can be an int or a float.

Are there any performance differences between them?

Structures may have a slight overhead due to storing all members, while unions are more memory efficient since they share the same memory space.