In JavaScript, scope works a tad differently than normal OO languages. One of the scopes in JavaScript is function scope. What this means is that anything we define within a function is only available to that function and anything nested within that function. Here is an example… This console log
In JavaScript, there are some additional assignment operators that we can use in addition to the normal equal sign. There are several, but the most common are addition/subtraction assignment operators. Here is an example… The output of startYear would be 2021. We could do the same thing with -=. Happy
JavaScript has a conditional operator that we can use in place of an if statement. Here is the syntax… So we have a test , which is in the parentheses, then a question mark (?). If the test returns true, the expression prior to the colon returns. Otherwise, the content
Unary operators are ++ and –. Each of these either increment by one or decrement by one. It is important to understand how these interact with variables because they can be placed prior to or after a variable. For example… This would log out 2021. Let’s change it a bit…
In JavaScript there are two ways to test equality/inequality. We can use two equal signs (==) or three equal signs (===). For inequality, it is similar != and !==. So what’s the difference? The difference is type. For example… This would return true because with a double equal sign, JavaScript
In JavaScript, we sometimes need to convert from one type to another. We can use a toDtring method to convert to a string. To convert to numbers, we can use parseInt and parseFloat. The biggest difference between the two is that parseFloat deals with decimal points. Each one of the
