String Traversal and Character Access in DSA C - Build from Scratch

String Traversal and Character Access

📖 Scenario: You are working on a simple text processing tool that needs to analyze a given word letter by letter.Imagine you have a word and you want to look at each letter to do some checks or transformations later.

🎯 Goal: Learn how to go through each character in a string one by one and access them using their position.You will write code to create a string, set up a counter, loop through the string characters, and finally print each character on its own line.

📋 What You'll Learn

Create a string variable with the exact value "HELLO"

Create an integer variable called index to track position

Use a while loop to traverse the string using index

Access each character using the string and index

Print each character on its own line

💡 Why This Matters

🌍 Real World

Text processing tools often need to look at each letter in a word to check spelling, count letters, or transform text.

💼 Career

Understanding how to traverse strings and access characters is a basic skill for programming jobs involving text manipulation, such as software development, data processing, and scripting.

1

Create the string variable

Create a string variable called word and set it to the exact value "HELLO".

DSA C

# Your code here

Hint

Use char word[] = "HELLO"; to create the string.

2

Create the index variable

Create an integer variable called index and set it to 0.

DSA C

char word[] = "HELLO";
# Your code here

Hint

Use int index = 0; to start from the first character.

3

Traverse the string using a while loop

Write a while loop that continues as long as word[index] is not the null character '\0'. Inside the loop, print the character at word[index] and then increase index by 1.

DSA C

char word[] = "HELLO";
int index = 0;
// Your code here

Hint

Use while (word[index] != '\0') to loop through each character.

Print each character with printf("%c\n", word[index]).

Increase index by 1 inside the loop.

4

Print the characters

Run the program to print each character of word on its own line.

DSA C

char word[] = "HELLO";
int index = 0;
while (word[index] != '\0') {
    printf("%c\n", word[index]);
    index++;
}
// Your code here

Hint

Make sure your program prints each letter on a new line exactly as shown.