Answer:
Variable:
A variable is a data name that may
be used to store a data value; unlike constants they can change their value
during program execution a variable may take different values at different
times during execution.
General form for declaring a
variable:
data_type name_of_the_variable;
Example:
int
sub1,sub2;
float
sum;
Initialization:
when a variable is assigned a value
at the declaration time, then it is called initialization.
General form:
data_type
variable_name=constant;
Example:
int
final_value=100;
char
yes=’x’;
double
balance=75.83;
Importance of Initialization:
Ø It is important to use an
initialization, because it provides the user some advantages than a separate
assignment statement.
Ø Global and static local variables
are initialized only at the start of the program. Local variables are
initialized each time the block, in which they are declared, is entered.
Un-initialized global and static local variables are automatically set to zero.
Ø By using this, compiler may be able
to produce faster code.
Ø Also, this saves some typing effort
on user’s part.