| Array | Arrays have (in general and in Java) fixed lengths:
They contain – once created – a fixed number of data elements.
Variables that manage arrays are reference variables (pointer variables) in Java: They contain the starting address of the memory area in which the individual array elements are stored one after the other. Those are accessed by specifying the element number (indexing): |
| How to create an array? | via Initialization: int a[] = new int [20]
via assignment: int b;
b = new int[] {0,8,15, 47, 11}; |
| Riddle | RIDDLE
EXTENSIONS:
1. EXPAND PROMPT TO
»NUMBER i OF n:«.
2. PRINT THE ARRAY IN REVERSE ORDER
3. PRINT THE ARRAY IN BOTH ORDERS
(3-COLUMN LAYOUT:
1ST COLUMN: PLACE NUMBER (INDEX) i, 2ND
COLUMN: iTH VALUE IN INPUT ORDER, 3RD
COLUMN: iTH VALUE IN REVERSE ORDER)
4. CHANGE ARRAY TO A FLOATING POINT
ARRAY WITH OUTPUT OF DESCRIPTIVE
STATISTICS (SUM OF VALUES,
MEAN, VARIANCE...) |
