Which of the following is the default return value of functions in C++?a)intb)charc)floatd)voidCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Default Return Value of Functions in C

In C programming language, a function is a collection of statements that perform a specific task. When a function is called, it can return a value to the calling program. However, if a function does not explicitly return a value, the default return value is assumed to be an integer.

Default Return Value

The default return value of functions in C is an integer, which is denoted by the keyword 'int'. This means that if a function does not specify a return type, the compiler assumes that the function returns an integer value.

For example,

```c
#include

// function without return type
void greet() {
printf('Hello, World! ');
}

// main function
int main() {
greet(); // calling greet function
return 0;
}
```

In the above code, the 'greet' function does not specify a return type, so the default return type of 'int' is assumed. However, since the function does not return any value, the return type is not important in this case.

Conclusion

In C programming language, the default return value of functions is an integer. It is important to specify the return type of a function if it returns a value to the calling program. If a function does not return a value, then the return type is not important.

Answer

C++ uses int as the default return values for functions. It also restricts that the return type of the main function must be int.

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