What is the output of this C code? #include "stdio.h" union stu { int ival; float fval; }; void main() { union stu r; r.ival = 5; printf("%d", r.ival); }

C Programming Language Union in C Language

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Q: What is the output of this C code?

    #include "stdio.h"
    union stu
    {
        int ival;
        float fval;
    };
    void main()
    {
        union stu r;
        r.ival = 5;
        printf("%d", r.ival);
    }

A 9
B Compile time error
C 16
D 5
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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? #include "stdio.h" union stu { int ival; float fval; }; void main() { union stu r; r.ival = 5; printf("%d", r.ival); }

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Q: What is the output of this C code?
#include "stdio.h" union stu { int ival; float fval; }; void main() { union stu r; r.ival = 5; printf("%d", r.ival); }