Array in C language

An array is a collection of elements of the same type at consecutive memory locations. The lowest address corresponds to the first element, and the highest address corresponds to the last element.

Array indexing starts with zero (0) and ends with the array size minus one (array size - 1). Array size must be an integer greater than zero.

Let us look at an example,

If array size = 10
First index of array = 0
Last index of array = array size - 1 = 10-1 = 9

This is the syntax of an array in C language,

type array_name[array_size ];

The following is the method of initializing an array.

type array_name[array_size] = { elements of array }

This is an example of C language array,

Example

Live demonstration

#include <stdio.h>
int main () {
   int a[5];
   int i,j;
   for (i=0;i<5;i++) {
      a[i] = i+100;
   }
   for (j=0;j<5;j++) {
      printf("Element[%d] = %d</p><p>", j, a[j] );
   }
   return 0;
}

Output

Element[0] = 100
Element[1] = 101
Element[2] = 102
Element[3] = 103
Element[4] = 104

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