String handling functions in c

String handling functions in c 

Introduction to String Handling Functions in C

    String handling is an essential aspect of programming in C language. Strings are a sequence of characters that represent textual data. C provides several built-in functions that can be used to manipulate and handle strings efficiently. In this blog, we will discuss the string handling functions in C language, their syntax, and provide examples to illustrate their usage.

String Handling Functions in C

1. strlen()

The strlen() function returns the length of a given string.

The syntax of the function is as follows:

size_t strlen(const char *str);

    Here, str is the string whose length needs to be determined. The function returns the length of the string.

Example:

#include <stdio.h>

#include <string.h>

int main() {

   char str[50] = "Hello,world!";

      printf("Length of the string is : %d\n ", strlen(str));

   return 0;

}

Output:

Length of the string is: 13

2. strcpy()

The strcpy() function is used to copy one string to another.

The syntax of the function is as follows:

char *strcpy( char *dest,const char *src);

    Here, dest is the destination string and src is the source string. The function returns the destination string after the copy operation.

Example:

#include <stdio.h>

#include <string.h>

int main() {

   char src[50] = "Hello,world!";

    char dest[50];

    strcpy(dest, src);

      printf("Destination string is : %s\n ", dest);

   return 0;

}

Output:

Destination string is: Hello, world!

3. strcat()

The strcat() function is used to concatenate two strings.

The syntax of the function is as follows:

char *strcat( char *dest,const char *src);

    Here, dest is the destination string and src is the source string. The function returns the concatenated string.

Example:

#include <stdio.h>

#include <string.h>

int main() {

   char str1[50] = "Hello, ";

   char str2[50] = "world!";

    strcat(str1, str2);

      printf("Concatenated string is : %s\n ", str1);

   return 0;

}

Output:

Concatenated string is: Hello, world!

4. strcmp()

The strcmp() function is used to compare two strings.

The syntax of the function is as follows:

int *strcmp(const char *str1,const char *str2);

    Here, str1 and str2 are the two strings to be compared. The function returns 0 if the two strings are equal, a negative integer if str1 is less than str2, and a positive integer if str1 is greater than str2.

Example:

#include <stdio.h>

#include <string.h>

int main() {

   char str1[50] = "Hello, world!";

   char str2[50] = "Hello, world!";

   int result = strcmp(str1, str2);

    if (result == 0) {

        printf("strings are equal.\n");

    }

    else {

        printf("strings are not equal.\n");

    }

   return 0;

}

Output:

strings are equal.

Conclusion

    String handling is an essential aspect of programming in C language. C provides several built-in functions that can be used to manipulate and handle strings efficiently. In this blog, we have discussed some of the most