Like variables, arrays too, should be declared before they are used.

This means that an array once initialized cannot be resized.Įach memory block represents an array element.Īrray elements are identified by a unique integer called as the subscript / index of the element. Here is a list of the features of an array −Īn array declaration allocates sequential memory blocks.Īrrays are static. To simplify, an array is a collection of values of the same data type. An array is a homogenous collection of values. TypeScript introduces the concept of arrays to tackle the same. Variables in a program are allocated memory in random order, thereby making it difficult to retrieve/read the values in the order of their declaration. Hence, the use of variables is not feasible when one needs to store a larger collection of values. This means that to store n values in a program n variable declarations will be needed.

In other words, a variable declaration can only contain a single at a time. The use of variables to store values poses the following limitations −

For each in typescript