Strings Theory

Strings in C are represented by array of characters. The end of a string is marked by a special character called null character ‘\0’.
String handling library functions are:

• strlen(name); →finds the length of string. 
• strcpy(s1,s2); →copy s2 to s1; 
• strcat(s1,s2);  →concatenate s1&s2 (s1=s1+s2) 
• strcmp(s1,s2);→compares s1 & s2 (0 if equal, else non zero number).

Declaration and initialization :

• char name[30]; 
• char name[30] = “Hello welcome”; 
• char name[]= {‘H’,’e’,’l’,’l’,’o’,’ ‘,’w’,’e’,’l’,’c’,’o’,’m’,’e’};