What is an Array?

An array is a collection of similar data types stored in contiguous memory locations.

Example:

int marks[5] = {90, 85, 78, 92, 88};

• Types of Arrays:

1. One-Dimensional Array
2. Two-Dimensional Array
3. Multidimensional Array (rare in beginners)

1D Array Example:

int a[3] = {10, 20, 30};

printf(“%d”, a[1]); // Output: 20

• Looping Through an Array:

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

   printf(“%d “, marks[i]);

}

• 2D Array Example:

int matrix[2][2] = {

   {1, 2},

   {3, 4}

};

Access element:

printf(“%d”, matrix[0][1]); // Output: 2