Difference between revisions of "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 == | ||
| + | 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?!
Contents
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.
