Learning about arrays

What is an array?

can store any number of data of the same type.

Declaration of the array: data type [] variable name;

Assignment of the array: variable name =new data type [length];

Merge writing: data type [] variable name =new data type [length];

The array must be the same as the type, and each array item has a number: called an index or subscript.

The index (subscript) of an array is a number of type int.

The index (subscript) starts at 0, and in turn is the number of each item in the array.

The default value of an array item: The value of an array item after it is created, and the default value for the array item type.

A numeric type with a default value of 0;

BOOL type, the default value is false;

Char type, default value is;

String type, the default value is null (empty meaning).

Reading of array items: variable name [index];

From the specified array, the value of an array item is fetched by number, and the return type is the same as the array item type.

Modification of array Item: variable name [index]= value;

Read array length: variable name. Length

Learning about arrays