C Array

Used to store multiple elements of the same data type under a single identifier.
They can be accessed using an index that starts from 0
Syntax:
data_type array_name[size];
  1. data_type - Declaring the type of data in an array i.e; int, float, char, etc.
  2. array_name - Declaring the name.
  3. size - Declaring the number of elements in an array

Example

#include <stdio.h>

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

    printf("Element at index 0: %d\n", numbers[0]);
    printf("Element at index 2: %d\n", numbers[2]);

    return 0;
}

See how the array works
  1. int numbers[5] declares 5 the size of the array.
  2. numbers[0] gets the first value in the array.

Modifying an Array

Using the index we can change or modify the values in an array.

Example

#include <stdio.h>

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

    numbers[1] = 6;
    numbers[2] = numbers[1];
    
    printf(numbers[1]);
    printf(numbers[2]);

    return 0;
}

Using Loops

We can access, modify the array using loops.
Using iterations in for and while loops we can access them through index.

Example

#include <stdio.h>

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

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

    return 0;
}

Quick Recap - Topics Covered

Quick Recap - Topics Covered

C Arrays
Modifying an Array
Using loops in an Array

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