C Programming: Arrays 🎯

Welcome to the world of C Programming! Today, we're diving into one of the most fundamental data structures - Arrays. By the end of this lesson, you'll have a solid understanding of arrays, their usage, and how they can help you build powerful applications. 💡

What are Arrays? 📝

In simple terms, an array is a collection of variables of the same type, stored in contiguous memory locations. Each variable in an array is called an element.

Declaring and Initializing an Array ✅

To create an array, we need to specify its type and the number of elements. Here's a simple example:

int numbers[5] = {1, 2, 3, 4, 5};

In this example, we've created an array named numbers that holds 5 integers (int). The values 1, 2, 3, 4, 5 are the initial values assigned to each element.

Accessing Array Elements 📝

To access an array element, we use its index. The first element in an array has an index of 0, the second has an index of 1, and so on.

int numbers[5] = {1, 2, 3, 4, 5};
printf("%d\n", numbers[2]); // Outputs: 3

Array Types 📝

One-Dimensional Arrays 📝

These are the most basic type of arrays. As the name suggests, they have one dimension.

Multi-Dimensional Arrays 📝

Multi-dimensional arrays allow you to store data in multiple rows and columns, much like a spreadsheet.

int matrix[3][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};
printf("%d\n", matrix[1][2]); // Outputs: 7

In this example, we've created a 3x4 matrix.

Array Sizes and Dynamic Memory Allocation 📝

In C, array sizes are fixed at the time of declaration. However, we can dynamically allocate memory for arrays using malloc().

int *numbers = (int *)malloc(5 * sizeof(int));
numbers[0] = 1;
numbers[1] = 2;
// ...

In this example, we've created an array of 5 integers dynamically.

Common Array Operations 📝

Finding the maximum element:

int numbers[5] = {1, 2, 3, 4, 5};
int max = numbers[0];
for (int i = 1; i < 5; i++) {
    if (numbers[i] > max) {
        max = numbers[i];
    }
}
printf("%d\n", max); // Outputs: 5

Finding the average of elements:

int numbers[5] = {1, 2, 3, 4, 5};
int sum = 0;
for (int i = 0; i < 5; i++) {
    sum += numbers[i];
}
printf("%f\n", (float)sum / 5); // Outputs: 3

C Programming: Arrays 🎯

C Programming: Arrays 🎯

What are Arrays? 📝

Declaring and Initializing an Array ✅

Accessing Array Elements 📝

Array Types 📝

One-Dimensional Arrays 📝

Multi-Dimensional Arrays 📝

Array Sizes and Dynamic Memory Allocation 📝

Common Array Operations 📝

Quiz 🎯