What are some examples of unions in programming?

Can you explain what unions are in programming?

Sure! In programming, a union is a data structure that allows you to store different data types in the same memory location.

Can you give me an example of how to use a union in C?

Of course! Here's a simple example:

union Data {
    int intValue;
    float floatValue;
    char charValue;
};

int main() {
    union Data data;
    data.intValue = 5;
    printf("%d\n", data.intValue);
    data.floatValue = 3.14;
    printf("%.2f\n", data.floatValue);
    return 0;
}

This union can hold an integer, a float, or a character, but only one at a time.

What happens if I try to access a different type after setting one?

If you access a different type after setting one, you'll get unpredictable results because the memory is shared. Always access the type you last set.

Are there any limitations to using unions?

Yes, unions can only hold one value at a time, and you need to manage the type carefully to avoid data corruption.