String-Handling Functions

• In C, string handling is commonly done using functions from the library.
• Some essential functions include:
• strlen(str):
  Returns the length of the string str.
• strcpy(dest, src):
  Copies the string src to dest. strcat(dest, src): Concatenates the string src onto the end of dest.
• strcmp(str1, str2):
  Compares two strings str1 and str2.
• strchr(str, ch):
  Returns a pointer to the first occurrence of character ch in string str.
• strstr(str1, str2):
  Returns a pointer to the first occurrence of string str2 in string str.
• Example:
Program.c
#include <stdio.h> #include <string.h> int main() { char str1[20] = "Hello"; char str2[20] = "World"; // Concatenate str2 onto str1 strcat(str1, str2); // Print the result printf("Concatenated string: %s\n", str1); // Find the length of the string int length = strlen(str1); printf("Length of the string: %d\n", length); // Compare two strings if (strcmp(str1, "HelloWorld") == 0) { printf("Strings are equal.\n"); } else { printf("Strings are not equal.\n"); } return 0; }

Output:
Concatenated string: HelloWorld
Length of the string: 10
Strings are equal.


• Make sure to handle memory carefully, and consider using safer alternatives like strncpy and snprintf to avoid buffer overflows.