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The '''determinant''' of a [[matrix]] (written |A|) is a single number that depends on the elements of the matrix A. Determinants exist only for square matrices (i.e., ones where the number of rows equals the number of columns).  

The '''determinant''' of a [[matrix]] (written |A|) is a single number that depends on the elements of the matrix A. Determinants exist only for square matrices (i.e., ones where the number of rows equals the number of columns).  

Determinants are a basic building block of [[linear algebra]], and are useful for finding areas and volumes of geometric figures, in [[Cramer's Rule]], and in many other areas ways.

Determinants are a basic building block of [[linear algebra]], and are useful for finding areas and volumes of geometric figures, in [[Cramer's rule]], and in many other areas ways.

==How to calculate==

==How to calculate==