Chapter 7: Arrays and Strings

Table of Contents

• Table of Contents
• 7.1 Arrays in C
• 7.2 Strings as Character Arrays
• 7.3 Common Array and String Operations
• 7.4 Exercises
• 7.5 Solutions
  • 7.5.1 Solution 1
  • 7.5.2 Solution 2
  • 7.5.3 Solution 3
• 7.6 What’s Coming in the Next Chapter

7.1 Arrays in C

Arrays store multiple values of the same type:

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

7.2 Strings as Character Arrays

Strings in C are arrays of characters ending with \0:

char name[] = "Alice";

7.3 Common Array and String Operations

• Accessing elements
• Modifying values
• Iterating with loops

7.4 Exercises

1. Declare an array of 10 integers and initialize it.
2. Write a function to calculate the sum of an integer array.
3. How do you find the length of a string in C?

7.5 Solutions

7.5.1 Solution 1

int arr[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

7.5.2 Solution 2

int sum(int arr[], int size) {
    int total = 0;
    for (int i = 0; i < size; i++) total += arr[i];
    return total;
}

7.5.3 Solution 3

Use strlen() from <string.h>.

7.6 What’s Coming in the Next Chapter

Next, you’ll learn about memory management in C!

Next Chapter → Memory Management – malloc, free, and You