Functions for Math: Performing Calculations

Learning Objectives Define a custom function that accepts one or more numbers as parameters. Use math operators (+, -, *, /) inside a function to perform a calculation. Use a 'return' statement to send a calculated value back from a function. Call a math function with specific arguments and store its returned value in a variable. Combine multiple math functions to solve a more complex problem. Explain the difference between a parameter (the placeholder) and an argument (the real value). Have you ever wondered how a video game instantly knows your new score after you collect a coin? 🎮 Let's learn how to build the code that does that math! In this lesson, we will learn how to create special blocks of code called functions that act like mini-calculators. These...

TermDefinitionExample FunctionA named block of reusable code that performs a specific task. For math, it's like creating your own custom calculator button.A function named `addNumbers` that takes two numbers and adds them together. ParameterA placeholder variable inside the function's definition. It's like an empty box waiting for a value to be put inside.In `function add(num1, num2)`, `num1` and `num2` are parameters. ArgumentThe actual value that you send to a function when you call it. It's the number you put into the empty box (the parameter).When you call `add(5, 3)`, the numbers `5` and `3` are the arguments. Return ValueThe value or answer that a function sends back after it has finished its calculation.The function `add(5, 3)` would have a return value of `8`....

Defining a Math Function function functionName(parameter1, parameter2) { // code to do math let result = parameter1 * parameter2; return result; } Use the `function` keyword, give it a name, and list its parameters in parentheses. Inside the curly braces `{}`, do your calculation and use `return` to send back the answer. Calling a Function and Storing the Result let myAnswer = functionName(argument1, argument2); To use a function, type its name and provide the actual values (arguments) in the parentheses. Use a variable with `=` to catch and save the return value.