What will be the output of the following C program?

int a[] = {5,10,15,20,25};
printf("%d", sizeof(a) / sizeof(a[0]));

Options

B. 5

Correct Answer: 5

The array contains five integer elements: 5, 10, 15, 20, 25.

sizeof(a) gives the total size occupied by the complete array. sizeof(a[0]) gives the size of one element.

Dividing the total array size by the size of one element gives the number of elements:

sizeof(a) / sizeof(a[0]) = 5

This is a common technique used in C to calculate the number of elements in an array.

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