Table of Contents
How can a function return a value in Arduino?
Getting a value back from a function is called “returning” the value from the function. The return keyword is used at the end of the function to get the value back. We must also say what type of value the function is returning, e.g. int, float, etc.
What is return 1 in Arduino?
library functions. Many arduino functions return -1 if something ‘fails’. Serial. read for example returns -1 or the infamous ÿ when this function is called while the serial buffer is empty.
What is a function in Arduino?
The functions allow a programmer to divide a specific code into various sections, and each section performs a particular task. The functions are created to perform a task multiple times in a program. The function is a type of procedure that returns the area of code from which it is called.
What does void do in Arduino?
The void keyword is used only in function declarations. It indicates that the function is expected to return no information to the function from which it was called.
How do you return a value in a void?
You declare a method’s return type in its method declaration. Within the body of the method, you use the return statement to return the value. Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so.
How can a function return two values in Arduino?
Return a struct with both values in it, or have your function take pointers to a and b and write the values there. Just use floor(num) to get a (if you need it outside the function), and return b from your function. If you only want to calculate a once, pass it into the function as a parameter.
How do you write a function in Arduino?
Arduino Coding – Writing Functions – 4 Examples
- Define the function – enclose the statements of the function.
- Call the function – use the function by using it’s name, adding any parameters if needed.
- Use the result of the function – optionally, your code can do something with the result from the function.
What does pinMode mean in Arduino?
The pinMode() function is used to configure a specific pin to behave either as an input or an output. It is possible to enable the internal pull-up resistors with the mode INPUT_PULLUP.
What is function return type?
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. The user-defined type may also be defined within the function declaration.