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and then 

M[I] [J] 

denotes the component J (of type T) of component I of M. 

For multidimensional arrays, it is customary to make these convenient abbreviations: 

and 

var M: array [A .. B,C .. D] of T; 

M[I, J] 

We may regard M as a matrix and say that M [I, J] is component J (in column J) of component I of M (of row I of M). 

Arrays are not limited to two dimensions, for T can again be a structured type. In general, the (abbreviated) form is: 

<img src='content_image/686053.jpg'>

If n index types are specified, the array is said to be n-dimensional, and a component is denoted by n index expressions. 

If A and B are array variables of the same type, then the assignment statement 

is allowed if the arrays are component-wise assignable: 

A := B 

A[i] := B[i] 

(for each i that is a value of the index type), and is an abbreviation for the assignment of each corresponding component. 

