What are strings and give any four string related functions.

String Handling in C Strings in C are represented as one-dimensional arrays of characters terminated by a null character ('\0'). Various functions in the <string.h> header facilitate string manipulation, including finding the length, copying, comparing, and concatenating strings. 1. strlen()

• Description: Returns the length of the string passed to the function.
• Syntax: size_t strlen(const char *str);

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

int main() {
    char str[100];
    printf("Enter a string: ");
    gets(str);
    int length = strlen(str);
    printf("Length of the string: %d", length);
    return 0;
}</code>

2. strcpy()

• Description: Copies the contents of the second string into the first string.
• Syntax: char* strcpy(char *destination, const char *source);

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

int main() {
    char source[100], destination[100];
    printf("Enter a string: ");
    gets(source);
    strcpy(destination, source);
    printf("Copied string: %s", destination);
    return 0;
}</code>

3. strcmp()

• Description: Compares two strings lexically.
• Syntax: int strcmp(const char *str1, const char *str2);

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

int main() {
    char str1[100], str2[100];
    printf("Enter two strings:\n");
    gets(str1);
    gets(str2);
    int result = strcmp(str1, str2);
    if(result == 0)
        printf("Strings are equal");
    else if(result < 0)
        printf("%s is greater", str2);
    else
        printf("%s is greater", str1);
    return 0;
}</code>

4. strcat()

• Description: Concatenates the second string to the end of the first string.
• Syntax: char* strcat(char *destination, const char *source);

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

int main() {
    char str1[100], str2[100];
    printf("Enter two strings:\n");
    gets(str1);
    gets(str2);
    strcat(str1, str2);
    printf("Concatenated string: %s", str1);
    return 0;
}</code>