Difference between revisions of "Variable"

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(How to Declare a Variable)
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== How to Declare a Variable ==
 
== How to Declare a Variable ==
 
You declare/create a variable by stating its type and then stating its name: <code>int myVar;</code>. You can also give an initial value for the variable during creation using the assignment operator: <code>int myVar = 69;</code>.
 
You declare/create a variable by stating its type and then stating its name: <code>int myVar;</code>. You can also give an initial value for the variable during creation using the assignment operator: <code>int myVar = 69;</code>.
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== Variable Names ==
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Variables names (the same as any other type of user-defined symbol) can contain any number, letter, and the underscore character. They cannot start with a number. Case matters (<code>_DirtayBoi69</code> is not the same symbol as <code>_dirtayboi69</code>).
  
 
== Variable Types ==
 
== Variable Types ==

Revision as of 18:46, 6 August 2016

Variables are like little boxes to store data in, typically numbers. What's in the box?!

How to Declare a Variable

You declare/create a variable by stating its type and then stating its name: int myVar;. You can also give an initial value for the variable during creation using the assignment operator: int myVar = 69;.

Variable Names

Variables names (the same as any other type of user-defined symbol) can contain any number, letter, and the underscore character. They cannot start with a number. Case matters (_DirtayBoi69 is not the same symbol as _dirtayboi69).

Variable Types

int

int variables store an integer (non-fractional number) ranging from -2147483648 to 2147483647. They occupy 4 bytes of memory.

The const Specifier

You can specify that a variable's value cannot be changed by declaring it like this: const int blazeItFgt = 420;. Doing so can protect your code from unintentional bugs and is generally considered a fucking good practice called 'const correctness'. Note that when you declare a variable as const, you need to initialize it during creation because you cannot assign to it afterwards.