Here’s an example of a JavaScript function that uses two types of variable, a function argument and a local variable: ...

JavaScript has a very powerful function system, where functions can be referenced just like any other variable. This is known as “first-class functions” and it’s a big source of JavaScript ...

After adding "y" to "x," JavaScript stores "11.234" in the "z" variable. You can control the number of decimal points that appear in a result by using the "toFixed" function. Instead of adding "x ...