What are strings in C?
Strings are considered a group of characters. In the C language, a string is denoted with the help of a character array.
Basically, the end of the string is denoted by specifying a null \0 character inside the memory.
Syntax
A string can be declared by:
char a[10].
In the example above, variable a is a character array where you can store up to 10 characters.
Initialization
A string can be initialized by:
char a[5] = {'H', 'e', 'l', 'l' '\0'};
#include <stdio.h>int main () {char a[5] = {'H', 'e', 'l', 'l', '\0'};printf("String: %s\n", a );return 0;}
String functions
Consider the two strings s1 and s2. Here are few built-in string functions that are available in the string.h header file:
-
strlen(s1): returns the length of a string. -
strcpy(s1, s2): copies string s2 to s1 -
strrev(s1): reverses the given string -
strcmp(s1, s2): returns0ifs1ands2contain the same string. Similarly, it returns less than0ifs1 < s2and it returns greater than0ifs1 > s2 -
strcat(s1, s2): concatenates two strings
