DSA Tutorial

🧠 Think of an array as a row of containers—each holds a value, and each has an index starting from 0.

🛠️ Array Declaration

int numbers[5];  // declares an array of 5 integers
    

Here, numbers can hold 5 integers, indexed from 0 to 4.

📦 Initialization

int marks[3] = {90, 85, 75};
    

You can also initialize later like:

marks[0] = 90;
marks[1] = 85;
marks[2] = 75;
    

🔍 Accessing Elements

You can access any element using its index:

printf("%d", marks[1]); // Outputs: 85
    

🔁 Looping through Arrays

for (int i = 0; i < 5; i++) {
    printf("%d ", numbers[i]);
}
    

This will print all 5 elements.

✅ Advantages: Easy to access and update elements using index, useful for static data storage.

⚠️ Limitations

• Fixed size (can’t grow dynamically)
• Wastes space if not fully used
• Inserting and deleting can be costly