Arrays in Programming

Aggregated datatype of

• Homogeneous type of elements: Array
• Heterogeneous type of elements: Structure

Arrays

Arrays have fixed size and sequentially indexed

int a[10]; 

It says that a is the variable which contains 10 integer values which are contiguously stored in memory. 

Each element can be thought of as a variable. '&' is used to get location in the memory.

Note: We assign value from a[0] to a[9] and we cannot assign value for a[10].

We may have arrays of 2D and 3D

Generic Programs

#define N 6

Preprocessor replace the value of N with 6 where ever it comes in program

When ever we change source code of the program, we need to save, recompile and run.

Arrays can also be used as Counters