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Which of the following is true about return type of functions in C?
- a)Functions can return any type
- b)Functions can return any type except array and functions
- c)Functions can return any type except array, functions and union
- d)Functions can return any type except array, functions, function pointer and union
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is true about return type of functions in C?a)F...
In C, functions can return any type except arrays and functions. We can get around this limitation by returning pointer to array or pointer to function.
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Which of the following is true about return type of functions in C?a)F...
Understanding Return Types in C
In C programming, functions play a crucial role, and their return types define what kind of data a function can send back to the caller.
1. Functions Can Return Any Type
- Functions in C can return various types, including:
- Primitive types (int, char, float, double)
- User-defined types (structs, enums)
- Pointers to any data type
2. Limitations on Return Types
- Arrays:
- Functions cannot return arrays directly. Instead, you can return a pointer to the first element of the array.
- Functions:
- You cannot return a function. However, you can return a pointer to a function, which can be used to call the function indirectly.
3. Why Option B is Correct
- The correct answer is option B, which states that functions can return any type except for arrays and functions. This is because:
- Arrays decay to pointers when passed to functions, and thus, returning an array would require returning a pointer, which is permissible.
- Functions themselves cannot be returned, but function pointers can be.
4. Clarification on Other Options
- Option C: Incorrect because unions can indeed be returned.
- Option D: Incorrect as it includes function pointers, which can be returned.
In summary, while C functions can return a variety of data types, the inability to return arrays and functions directly is a key characteristic. Understanding these limitations is essential for effective programming in C.
In C programming, functions play a crucial role, and their return types define what kind of data a function can send back to the caller.
1. Functions Can Return Any Type
- Functions in C can return various types, including:
- Primitive types (int, char, float, double)
- User-defined types (structs, enums)
- Pointers to any data type
2. Limitations on Return Types
- Arrays:
- Functions cannot return arrays directly. Instead, you can return a pointer to the first element of the array.
- Functions:
- You cannot return a function. However, you can return a pointer to a function, which can be used to call the function indirectly.
3. Why Option B is Correct
- The correct answer is option B, which states that functions can return any type except for arrays and functions. This is because:
- Arrays decay to pointers when passed to functions, and thus, returning an array would require returning a pointer, which is permissible.
- Functions themselves cannot be returned, but function pointers can be.
4. Clarification on Other Options
- Option C: Incorrect because unions can indeed be returned.
- Option D: Incorrect as it includes function pointers, which can be returned.
In summary, while C functions can return a variety of data types, the inability to return arrays and functions directly is a key characteristic. Understanding these limitations is essential for effective programming in C.
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Which of the following is true about return type of functions in C?a)Functions can return any typeb)Functions can return any type except array and functionsc)Functions can return any type except array, functions and uniond)Functions can return any type except array, functions, function pointer and unionCorrect answer is option 'B'. Can you explain this answer?
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