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50 lines
2.0 KiB
50 lines
2.0 KiB
Variables act as aliases to the values that we want them to represent and they allow us to access and manipulate the
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values that we assign to them.
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For example we could use the variable \pigVar{name} to represent the value \pigVal{"Brett Langdon"}.
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We do this with programming so that we can then access the value \pigVal{"Brett Langdon"} with a shorter representation, \pigVar{name}.
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\subsection{Declaration}
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To start with variables we need to declare their existence.
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By declaring a variable we are saying to the program, here is our alias and here is the value that we want it to represent.
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\begin{lstlisting}[caption={Variable Declaration}]
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a = 10
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print a
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\end{lstlisting}
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In the above example we are saying that we want to store the integer value \pigVal{10} into the variable \pigVar{a}.
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We can then use the variable \pigVar{a} to access the value \pigVal{10}.
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This program will output \pigOut{10} rather than \pigOut{a}.
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\par
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When we declare variables we are telling the programming language to allocate some space in your computers memory
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in order to store the value that you need it to.
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The amount of space needed to store each variable depends based on your specific language being used and which data
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type is being used to store the value.
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\subsection{Data Types}
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Programming languages support different types of data types or different types of values that they can represent in variables.
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Some programming languages use multiple different types of values but most of them support the basic types: string, integer (multiple kinds)
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and boolean (true or false).
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\begin{lstlisting}[caption={Data Types}]
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string = "Brett"
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integer = 10
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boolean = false
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\end{lstlisting}
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Please keep in mind that each programming language supports different data types and you should research those types to better
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understand variables in that language.
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As well some programming languages that are strickly typed which requires us to define the data type of the
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variable on declaration (unlike our sudo language).
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\subsection{Operations}
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\subsection{Conclusion}
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