Variable And Constant in Computer Programming

Variable & Constant

Variable

§A variable is nothing but a name given to a storage area that our programs can manipulate. Each variable in C has a specific  data type, which determines the size of the variable's memory.

§A variable is an entity that does change.

 Numeric VariableàUsed to stores either integer values or character  values. 

 Character Variableà Used to stores Alphabet or ASCII values.

§A variable cannot be type void.  

  int a    10

*Here int is a data type of variable a whose constant value is 10       

Constant   

§A constant is an identifier   whose value doesn't change during execution of program. 

§Numeric Integer

§IntegeràSequence of digits            //23 , 102 , 154 etc…

§Real    àA floating point type or fractional values.     // 3.7 , 6.45 , 34.65 etc… 

Character Integer 

§Singleà     ‘a’  ‘d’  ‘g’  ‘C’ etc….

§Stringà     “samir”   “Uddin”  

§Declaring Constant

§Count float pi=3.14                       

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