Initialization of One-Dimensional Arrays:

After an array is declared, its elements must be initialized. Otherwise, they will contain “garbage values”.  An array can be initialized at either of following stages:

1.  At compile time
2.  At run time

Compile Time Initialization:

We can initialize the elements of arrays in the same way as the ordinary variables when they are declared. The general form of initialization of arrays is:

The values in the list are separated by commas. For example, the statement

                              int number [3] = { 0,0,0 };

will declare the variable number as an array of size 3 and will assign zero to each element. If the number of values in the list is less than the number of elements, then only that many elements will be initialized. The remaining elements will be set to zero automatically.

Run Time Initialization:

An array can be explicitly initialized at run time. This approach is usually applied for initializing large arrays. For example, consider the following segment of C program.

int i, a[5];

for(i=0;i<5;i++)

{

            printf(“\n Enter Number :”);

            scanf(“%d”,&a[i]);

}

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