STRINGS

Introduction to Strings

• A character array represents a string that ends with a Null character (\0).
• Null character is an escape sequence with ASCII value 0.
• Null character is placed automatically at end of the string.

Declaration of string

Syntax:

char varname[size];

Example:

char A[10];

A is a character array of size 10.

Initialization of string

• Like variables, strings are also initialized in 2 ways.
• Static initialization/compile time
• Dynamic initialization/Run time
• Static initialization is done in two ways:

(i) Assigning a string to a character array.

(ii) Assigning character by character to a character array.

Case 1:

char s[10]=”Hello world”;

The compiler automatically inserts the Null character at the end.

Case 2:

char s[10]= {'H','e','l','l','o',','w','o','r','l','d','\0'};

If data is given character by character ‘\0’ is added manually.