What does main function return in C?

What should main() return in C/C++? The return value of main() function shows how the program exited. The normal exit of program is represented by zero return value. If the code has errors, fault etc., it will be terminated by non-zero value.

What does return do in functions?

When a return statement is used in a function body, the execution of the function is stopped. If specified, a given value is returned to the function caller. For example, the following function returns the square of its argument, x , where x is a number.

What does the return 0 statement in main function indicate in C?

return 0 in the main function means that the program executed successfully. return 1 in the main function means that the program does not execute successfully and there is some error. return 1 means that the user-defined function is returning true.

What is the purpose of the return statement in a function quizlet?

What is the purpose of the Return statement in a function? The Return statement specifies the value that the function returns to the part of the program that called the function. When the Return statement is executed, it causes the function to terminate and return the specified value.

Does main need return statement in C?

In C90, main() must have an explicit return statement at the end to avoid undefined behaviour. In C99 and newer, you may omit the return statement from main() . If you do, and main() finished, there is an implicit return 0 .

Is return statement mandatory in C?

It’s not mandatory to have a return statement in a function declared as returning non-void and it doesn’t have to lead to undefined behaviour. Such a function could: Not return, say by entering an infinite loop.

What does the return statement in main function indicate?

A return statement ends 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.

What is the return value of a function that has no return statement defined?

If expression is omitted, the return value of the function is undefined. 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.

What is the return statement in C programming?

return Statement (C) 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.

What is the purpose of a 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 no return statement appears in a function definition?

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.

What is the difference between call and return in C++?

When you call a function the control of the program is transferred from the calling function to the called function. The return statement returns the control to the previous routine. That function will continue its execution from the point where it was paused. On the contrary, a function that calls the return statement is finished.