The result is the value that a function returns when it executes (runs).
A function is defined as a relation between a set of inputs having one output each. In simple words, a function is a relationship between inputs where each input is related to exactly one output.
The Python return statement is a special statement that you can use inside a function or method to send the function's result back to the caller. A return statement consists of the return keyword followed by an optional return value. The return value of a Python function can be any Python object.
The result of a function is called its return value and the data type of the return value is called the return type. If a function declaration does not specify a return type, the compiler assumes an implicit return type of int .
Always, Only one value can be returned from 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.
Some functions don't return a significant value, but others do. It's important to understand what their values are, how to use them in your code, and how to make functions return useful values.
The result of a function is called its return value and the data type of the return value is called the return type. Every function declaration and definition must specify a return type, whether or not it actually returns a value.
Functions that return values are sometimes called fruitful functions.
A function that returns a value is called a value-returning function.
Calling a function from within itself is called recursion and the simple answer is, yes.
A return statement ends the processing of the current function and returns control to the caller of the function.
Functions are also called maps or mappings, though some authors make some distinction between "maps" and "functions" (see § Other terms). Two functions f and g are equal if their domain and codomain sets are the same and their output values agree on the whole domain.
Constant Function: The polynomial function of degree zero. Linear Function: The polynomial function of degree one. Quadratic Function: The polynomial function of degree two. Cubic Function: The polynomial function of degree three.
A function is an equation that has only one answer for y for every x. A function assigns exactly one output to each input of a specified type. It is common to name a function either f(x) or g(x) instead of y. f(2) means that we should find the value of our function when x equals 2.
In Python, you define a function with the def keyword, then write the function identifier (name) followed by parentheses and a colon. The next thing you have to do is make sure you indent with a tab or 4 spaces, and then specify what you want the function to do for you.
A function is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application and a high degree of code reusing. As you already know, Python gives you many built-in functions like print(), etc. but you can also create your own functions.
The first line of the function definition is called the header; the rest is called the body. The header has to end with a colon and the body has to be indented. By convention, the indentation is always four spaces (see Section 3.13).
Void (NonValue-Returning) functions: Void functions are created and used just like value-returning functions except they do not return a value after the function executes.
Functions with no return value are sometimes called procedures.
Answer. NO, a function does not always have to have an explicit return statement. If the function doesn't need to provide any results to the calling point, then the return is not needed.
Returning values ¶
Values are returned by using the optional return statement. Any type may be returned, including arrays and objects. This causes the function to end its execution immediately and pass control back to the line from which it was called.
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.
Functions without an explicit return statement return automatically after running the last statement at the end of the function body. A return statement can appear anywhere in a function any number of times - anywhere the programmer wants to end the function.