Variable In C++ .

In this session i have discussed the variable in C++ .

Variable is a temprary place holder in memory that can hold the value .

Variable is a named location in memory that can hold the value .

Variable hold the value according their data types .

Variable Syntax :

    Data-Type Variable-Name 
    Data-Type Variable-Name =Value


C++ variable always defined with data type . You can assign the value at declaration time or later .

Variable Declaration :

    int x; // variable x declaration
    x=10;   // value assinged in x variable 
    int y=20; // variable declared and assigned the value at same time 

    int i , j  // Multiple line declaration of variable it is allowed in C++


    int m=20;
    int n=m; // assign the value from m variable to n variable 

Rules for variable :

1-C++ is not allowed to give keywords as the name of variable .

2-C++ is not allowed Blank space in variable name .

3-C++ is allowed underscore(_) in variable name .

4-C++ variable is always start with alphabet not from number .

5-C++ is not allowed the special character like @ ,$ ,%,& etc in variable name .

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