C String Manipulation Examples 🎯

Welcome to our comprehensive guide on C String Manipulation! In this lesson, we'll dive deep into understanding and manipulating strings in C, a fundamental skill for every C programmer. Whether you're a beginner or an intermediate learner, this lesson is designed to help you master the art of string manipulation in C. Let's get started!

Understanding Strings in C 📝

A string in C is an array of characters, followed by a null character \0. This null character signifies the end of the string.

char str[10] = "Hello";

In the above example, the string "Hello" is an array of 6 characters, including the null character at the end.

Basic String Operations 💡

Length of a String

To find the length of a string, we use the strlen() function.

#include <stdio.h>
#include <string.h>

int main() {
    char str[10] = "Hello";
    int len = strlen(str);
    printf("Length of the string: %d\n", len);
    return 0;
}

Checking if a String is Empty

To check if a string is empty, we can compare the length of the string to zero.

#include <stdio.h>
#include <string.h>

int main() {
    char str[10] = "";
    int len = strlen(str);
    if(len == 0) {
        printf("The string is empty.\n");
    } else {
        printf("The string is not empty.\n");
    }
    return 0;
}

Concatenating Strings

To concatenate two strings, we can use the strcat() function.

#include <stdio.h>
#include <string.h>

int main() {
    char str1[10] = "Hello";
    char str2[10] = "World";
    char result[20];
    strcat(str1, " ");
    strcat(str1, str2);
    strcpy(result, str1);
    printf("Concatenated string: %s\n", result);
    return 0;
}

Quiz Time 💡

Stay tuned for our next lesson where we'll explore more advanced string manipulation techniques in C! 🚀