What is the output of this C code(size of int and float is 4)? #include "stdio.h" union { int ival; float fval; } u; void main() { printf("%d", sizeof(u)); }

C Programming Language Union in C Language

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Q: What is the output of this C code(size of int and float is 4)?

    #include "stdio.h"
    union
    {
        int ival;
        float fval;
    } u;
    void main()
    {
        printf("%d", sizeof(u));
    }

A 16
B 8
C 4
D 32
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Union is an user defined datatype in C programming language. It is a collection of variables of different datatypes in the same memory location. We can define a union with many members, but at a given point of time only one member can contain a value. Unions can be very handy when you need to talk to peripherals through some memory mapped registers.

Q: What is the output of this C code(size of int and float is 4)? #include "stdio.h" union { int ival; float fval; } u; void main() { printf("%d", sizeof(u)); }

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Q: What is the output of this C code(size of int and float is 4)?
#include "stdio.h" union { int ival; float fval; } u; void main() { printf("%d", sizeof(u)); }