Following are the differences between a local
variable and global variable:
Local variable
- Declaration:
A variable which is declared inside the function
or block is known as a local variable.
- Scope:
The scope of a variable is available within a
function in which they are declared.
- Access:
Variables can be accessed only by those
statements inside a function in which
they are declared.
- Life:
Life of a variable is created when the function
the block is entered and destroyed on its exit.
- Storage
Variables are stored in a stack unless
specified.
- Example:
void function1(){
int x=10;
}
Global variable
- Declaration:
A variable which is declared outside function or block is known as a global variable.
- Scope:
The scope of a variable is available throughout the program.
- Access:
Any statement in the entire the program
can access variables.
- Life:
Life of a variable exists until the program
is executing.
- Storage
The compiler decides the storage location
of a variable.
- Example:
int value=20;
void function1(){
int x=10;
}
