Constant

  • A constant is a value or identifier whose value is fixed and does not change, in the entire program.
  • Constant is similar to a variable but it can hold only a single variable during the execution of program.
  • Ex: const double PI = 3.14;
    Here,

    • Const is a identifier
    • Double is a data type
    • PI is a constant variable name that takes a value of 3.14.
    • This value of 3.14 does not change during the entire program.

Variable

  • Variable is any characteristic, number, or quantity that can be measured or counted.
  • It is also called as data item.
  • A Variable is a name or an identifier that can store any values, and those values can be changed at any time during the program.
  • For example: int score = 6;
    • Here, score is a variable name of integer type that stores the value 6. The value of score can be changed any time during the program.

 

 

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