Variable in C++
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Variable in C++
Variable is an identifier which holds data or another one variable is an identifier whose value can be changed at the execution time of program. Variable is an identifier which can be used to identify input data in a program.
Syntax
Variable_name = value;
Variable declarations
This is the process of allocating sufficient memory space for the data in term of variable.
Syntax
Datatype variable_name;
int a;
If no input values are assigned by the user than system will gives a default value called garbage value.
Garbage value
Garbage value can be any value given by system and that is no way related to correct programs.
It is a disadvantage and it can overcome using variable initialization.
Variable initialization
It is the process of allocating sufficient memory space with user defined values.
Syntax
Datatype nariable_name=value;
Example
int b = 30;
Variable assignment
It is a process of assigning a value to a variable.
Syntax
Variable_Name = value
Example
int a= 20; int b;
Example
b = 25; // --> direct assigned variable b = a; // --> assigned value in term of variable b = a+15; // --> assigned value as term of expression
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