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I mentioned before that your variable names should be descriptive so you know what kind of data they hold. Best Practices for Naming Variables and Constants In those cases, it’s simply a matter of changing the var keyword to the let keyword in the variables’ declarations. Also, if your program uses variables that never change their data, Xcode will suggest changing the variables into constants instead. Over the course of your Swift journey, you’ll build a sense of when to use variables versus constants. Despite this, it’s more preferable in some cases to use constants over variables, like to keep track of data you don’t intend to change later. Here, Xcode tells me that I cannot assign something else to the constant lastName because it was already assigned the value of “Smith”.Īt this point, it seems that variables are much more flexible than constants. Here’s how our variable looks in the playground: A complete example of the variable declaration is given below. Since we named this variable “firstName,” we’ll give it a piece of text data, namely the word “Tom.” Note: the single equal sign lets us assign a piece of data to the firstName variable.

For example, if I had a piece of data for someone’s first name, I might name my variable firstName.įollowing your variable name, add an equal sign and then the piece of data you want to keep track of. You can name it anything you want, but the name should clearly describe the data the variable will contain. First, type the keyword var, followed by a space, and your variable’s name.
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Let’s learn how to create, or declare, a new variable to track a piece of data in memory. This is where variables come in, to help keep track of data within an app. For us to work with data, we need a way to refer to it in our programs. Your computer stores data in its memory to keep track of where the data is and what it is. We can even have text data like "Hello" surrounded by double quotes on line 5. Data can be numbers like 123 and the decimal 0.7 as shown on lines 3 and 4. It will take some time for the activation to complete please be patient until you see the message “Activation Successful.Here, we have different types of data. Hit the “Activate” button and enjoy the Professional version for free. Launch the app, on the main interface, click the “Activate” (key icon) button and enter the below code.
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Install the software, when you launch it for the first time don’t update to the latest version.
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The latest version lets you safely merge adjacent partitions on the same disk and wipe data from unallocated space (removing all trace of a previously deleted partition).

You can also use it to convert, explore and hide partitions, and change drive letters. This All-in-one Hard Drive & Partition Manager Solution lets you extend system partition, fix low disk space problem, extend NTFS system partition without reboot and build MBR.ĮASEUS Partition Master Pro lets you create, copy, resize, format and delete disk partitions. EaseUS Partition Master Pro is an ALL-IN-ONE disk partition management tool with three key functions including Disk & Partition Copy Wizard, Partition Recovery Wizard, and Partition Manager.įurthermore, this tool also allows you to create a bootable CD/DVD to use it in a system boot failure situation.
