Functions and Methods in Programming

• Computer Science

Functions and Methods in Programming

What is a Function?

A Function is a REUSABLE block of code that performs a specific task. Functions can take arguments and can return values, but neither is required.

Why do we use functions?

To make code shorter

To reuse instructions

To confuse the computer

To avoid variables

Parts of a Function

Name - Label to call the function

Arguments - Variables that are passed into the function

Body - Steps to follow

Return - The output or result of the function

Can you think of something you do every day that could be a function?

Practice

Create a function called Greetings. Greetings takes one argument and returns a greeting using the name.

Create a function called Add that takes two numbers ("a" and "b"). Return the value of a + b

What is a function in coding?

1. A type of variable
2. A reusable block of code
3. An error in code
4. A data structure

What are arguments in a function?

1. Local variables
2. Values passed to a function
3. Function names
4. Return values

What does a return statement do?

1. Exits a function and gives output
2. Calls another function
3. Creates a loop
4. Defines a function

Can a function have multiple arguments?

1. Only numbers as arguments
2. Yes, it can have many arguments
3. No, only one argument allowed
4. Only strings as arguments

What is a method in coding?

1. A function associated with an object
2. A type of loop
3. A variable type
4. An error handler