Question: Why Return Is Used In Function?

What happens if you dont use return 0 in C?

If a function is declared as returning a type other than void , then it must have a return statement.

The only exception to this is the main function, which as of C99, can omit the return statement (when it is omitted, the behaviour is the same as if there was a return 0; statement before the closing } of main )..

Is void a function?

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.

Can you console log in JSX?

log can be used inside of JSX!

What is the difference between return 0 and return 1?

in main function return 0 or exit(0) are same but if you write exit(0) in different function then you program will exit from that position. returning different values like return 1 or return -1 means that program is returning error . … But destructors are called if return 0 is used.

What is the difference between return and console log?

The main purpose of the return value, is to use the function return value like you would have use a variable value. the console. log(); is a function (you can see the brackets) that will write the argument value on the console. And only the debuging console, in a browser you will not see anything on the screen.

Can you return a function?

And you can return a function. a function is just a thing. In your case, returning b returns the thing, the thing is a callable function. Returning b() returns the value returned by the callable function.

What value does printf return?

The printf() function is used for printing the output. It returns the number of characters that are printed. If there is some error then it returns a negative value.

What does return do in a function?

The return statement causes your function to exit and hand back a value to its caller. The point of functions in general is to take in inputs and return something. The return statement is used when a function is ready to return a value to its caller.

Why do we use return 0 in main function?

The return value of the main function is considered the “Exit Status” of the application. On most operating systems returning 0 is a success status like saying “The program worked fine”. In C++ it is optional to type ” return 0; ” at the end of the main function and the compiler includes it automatically.

What is the point of console log?

The JavaScript console log function is mainly used for code debugging as it makes the JavaScript print the output to the console. To open the browser console, right-click on the page and select Inspect, and then click Console.

What return means C++?

The return statement causes execution to jump from the current function to whatever function called the current function. An optional a result (return variable) can be returned. A function may have more than one return statement (but returning the same type). Syntax.

What is the return value of a function?

A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string. The type of value your function returns depends largely on the task it performs.

What are the 4 types of functions?

Types of FunctionsOne – one function (Injective function)Many – one function.Onto – function (Surjective Function)Into – function.Polynomial function.Linear Function.Identical Function.Quadratic Function.More items…•

Why return is used in Python?

A return statement is used to end the execution of the function call and “returns” the result (value of the expression following the return keyword) to the caller. The statements after the return statements are not executed. If the return statement is without any expression, then the special value None is returned.

Can you return a console log?

log() is a function used to print information to the console. return on the other hand is a call to pass some value back up to where the call was made. … You would call your function like this: var ans = square(5); This would set ans equal to the value returned by square() but will not print it to the console.