Can you have a function without a return statement?

Can you have a function without a return statement?

If no return statement appears in a function definition, control automatically returns to the calling function after the last statement of the called function is executed. In this case, the return value of the called function is undefined.

Which functions Cannot have a return statement?

Void functions are created and used just like value-returning functions except they do not return a value after the function executes. In lieu of a data type, void functions use the keyword “void.” A void function performs a task, and then control returns back to the caller–but, it does not return a value.

Does int main need a return statement?

5 Answers. Reaching the } that terminates the main function returns a value of 0. If the return type is not compatible with int , the termination status returned to the host environment is unspecified. However, you should add a return statement.

Do all functions have a return statement?

Regardless of how long and complex your functions are, any function without an explicit return statement, or one with a return statement without a return value, will return None .

What is the default return type of functions?

The default returns value from a function in int. In other words generally unless explicitly specified the default return value by compiler would be integer value from function. Mention eth return type in the calling function and Mention the return type in the called function.

Which of the following does the function return if a function doesn’t have any return statement?

If a function doesn’t have a return statement, which of the following does the function return? Explanation: A function can exist without a return statement and returns None if the function doesn’t have a return statement.

What does scanf () function return?

The scanf() function is used for obtaining the input from the user. It returns the number of input values that are scanned. If there is some input failure or error then it returns EOF (end-of-file).

Can a function have more than one return statement true or false?

A function may have any number of return statements each returning different values. Explanation: True, A function may have any number of return statements each returning different values and each return statements will not occur successively.

What should int main return?

int main(int argc, char *argv[], char *envp[]); Alternatively, the main and wmain functions can be declared as returning void (no return value). If you declare main or wmain as returning void, you cannot return an exit code to the parent process or operating system by using a return statement.

What is difference between void main and int main?

The void main() indicates that the main() function will not return any value, but the int main() indicates that the main() can return integer type data. When our program is simple, and it is not going to terminate before reaching the last line of the code, or the code is error free, then we can use the void main().

Do you always have to return something from a function JavaScript?

So to recap: No, a JS function needn’t return anything as far as your code goes. But as far as the JS engines are concerned: a function always returns something, be it explicitly via a return statement, or implicitly. If a function returns implicitly, its return value will always be undefined.

What is the default return type of a function?

The default return data type in a function is int.

Can a function return nothing without a return statement?

There was no good way to return “nothing”, so the return statement was not required. C also at this time had “implicit int ” declarations – you could define a function body without a type, and the compiler would assume it was typed int: foo is implicitly typed to return int, even if no value is explicitly being returned.

Why does my function not return an int?

It should not work and certainly do not work on all compilers and target OS, even if it works on yours. The likely explanation is that a function returning int always return something, and it’s usually the content of a register.

When is it necessary to use return statement?

The return statement terminates the execution of a function and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can also return a value to the calling function.

What happens if an expression is not present in the return statement?

The value of expression, if present, is returned to the calling function. If expression is omitted, the return value of the function is undefined. The expression, if present, is evaluated and then converted to the type returned by the function.