Variables

In Lisp symbols are used to represent variables. Each symbol contains a slot which is used to contain the value of the symbol when it is used as a symbol.

The normal way to obtain the current value of a variable is simply to evaluate the symbol it lives in (i.e. write the name of the variable in your program).

Function: symbol-value variable

This function returns the value of the symbol variable in the current environment.

• Local Variables: Creating temporary variables
• Setting Variables: Altering a variable's value
• Scope and Extent: Technical jargon
• Buffer-Local Variables: Variables with distinct values in each buffer.
• Void Variables: Some variables have no values
• Constant Variables: Variables which may not be altered
• Defining Variables: How to define a variable before using it

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