Thursday, 17 May 2018

constant- notes in java

Constant-=> Constant is fixed value, that don't
change during the execution of program. Any variable declared to final is called ‘constant'. Thus, constant value must be specified with an initialization when declared & that constant value never be changed.
For Example: For constant we use ‘const' keyword. Single
     character or backlash  character constant enclosed in single quote marks. String constant enclosed in double quote marks.

const int a=10;
const float f=25.98f;
const char c=‘x';
const String season=“HelloTycoon”;
Java supports various types of constant as:

Numeric constant:
     a. Integer constant: e.g.
     121, 024,0x3 etc.
     b. Real constant: e.g.
     0.55, 0.45e4, 1.3e+2 etc.
2. Character constant:
     a. Single character constant: e.g.
        ‘x','3',';' etc.
         Java also supports backslash special character constant, that are used in output methods., e.g.
‘\n', ‘\f', ‘\”' etc.
     b. String constant: e.g.
   “Hellotycoon”, “2020”,”thanks” etc.


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