Variable Types

Lisp uses dynamic type checking, or type checking performed at runtime. Many other languages use static type checking, or type checking performed at compile time. In those languages, a variable has the same type throughout its lifetime (its lexical scope); every use of a variable is checked to make sure it has the correct type.

The basic types in the languages are:

Scheme	Pascal	C++	Java
integer	integer	int	long
real	real	float	double
character	char	char	char
boolean	boolean	int	boolean
string		char []	char []
#f		void	void

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