Java literals

1. 1 Java Literals Literal in Java refer to fixed values that do not change during the execution of the program Java supports several types of constants Integer Literal Real Literal Character Literal String Literal Backslash Literal

2. 2 Integer Literals An integer literal refers to sequence of digits Integers are of three types They are Decimal Integer Octal Integer Hexa Decimal Integer

3. 3 Decimal Integer Decimal Integers consists of a set of digits from 0 to 9,preceeded by an optional minus(-) sign eg. : +999,-999 Embedded spaces ,commas and non-digit characters are not permitted in between digits eg. 99 999, 99,999 , $999 are illegal numbers.

4. 4 Octal Integer An octal integer consists of any combination of digits from 0 to 7 with a leading zero(0) eg. 045,063,026 etc.,

5. 5 Hexa Decimal Integer A sequence of digits preceded by 0x or 0X is considered as hexa decimal integers They may also include alphabets from A to F or a to f Letters from a to f represents the numbers from 10 to 15 eg. 0xd,0XF etc.,

6. 6 Real Literals Numbers containing fractional parts are called real literals eg. 9.999,0.999 etc., The numbers are also expressed in exponential notation eg. 999.9 may be written as 9999E-3.E-3 mean multiply by 10 -3

7. 7 Single Character Literals A single character constant contains a single character enclosed with a pair of single quote marks ‘ ‘ eg. ‘m’

8. 8 String Literals A String Literal is a sequence of characters enclosed between double quote marks “ “ The characters may be alphabets, digits, special characters and blank spaces eg. “neelu”

9. 9 Backslash Literals Java supports some special back slash character literals They are used in output formatting methods eg. \n stands for new line \t stands for horizontal tab \b stands for blank space \v stands for vertical tb \a stands for a small beep