String In C

	The string in C programming language is a one-dimensional array of characters which is terminated by a null character '\0'. Thus a null-terminated string contains the characters that comprise the string followed by a null. C Programming The declaration and initialization for creating a a word "World".To determine the end of the string ,there is a symbol ('\0') at the end of the array which means null character. char greeting[6] = {'W', 'o', 'r', 'l', 'd', '\0'}; The declaration of a string in C Programming language is:  char a[] = "Hello";  The memory presentation of above defined string in C Programming language is: String Presentation in C:  You not need to  place the null character at the end of a string by yourself. The C compiler automatically places the '\0' at the end of the string when it initializes the array. #include <stdio.h> int main () {    char greeting[6] = {'H', 'e', 'l', 'l', 'o', '\0'};    printf("Greeting message: %s\n", greeting );    return 0; } Output: Greeting message: Hello C Provide a wide range of functions that manipulate null-terminated strings: S.N.   Function & Purpose 1strcpy(s1, s2);      Copies string s2 into string s1. 2strcat(s1, s2);       Concatenates string s2 onto the end of string s1. 3strlen(s1);             Returns the length of string s1. 4strcmp(s1, s2);     Returns 0 if s1 and s2 are the same; less than 0 if                                                   s1<s2; greater than 0 if s1>s2. 5strchr(s1, ch);       Returns a pointer to the first occurrence of character                                             ch in string s1. 6 strstr(s1, s2);       Returns a pointer to the first occurrence of string s2                                               in string s1. #include <stdio.h> #include <string.h> int main () {    char str1[12] = "Hello";    char str2[12] = "World";    char str3[12];    int  len ;    /* copy str1 into str3 */    strcpy(str3, str1);    printf("strcpy( str3, str1) :  %s\n", str3 );    /* concatenates str1 and str2 */    strcat( str1, str2);    printf("strcat( str1, str2):   %s\n", str1 );    /* total lenghth of str1 after concatenation */    len = strlen(str1);    printf("strlen(str1) :  %d\n", len );    return 0; } OutPut: strcpy( str3, str1) :  Hello strcat( str1, str2):   HelloWorld strlen(str1) :  10
C - Overview
C - Basic Syntax
C - Data Types
C - Variables
C - Constants
C - Storage Classes
C - Operators
C - Decision Making
C - Loops
C - Functions
C - Scope Rules
C - Arrays
C - Pointers
C - Strings
C - Structures
C - Unions
C - Bit Fields
C - Typedef
C - Input & Output
C - File I/O
C - Preprocessors
C - Header Files
C - Type Casting
C - Error Handling
C - Recursion
C - Variable Arguments
C - Memory Management
C - Command Line Arguments