1.Variables:
Variables
represent storage locations. Every variable has a type that determines what
values can be stored in the variable.
C# is a
type-safe language, and the C# compiler guarantees that values stored in
variables are always of
the appropriate type.
int interestRate = 5;
//Declare the variable and initialize it to 5
interestRate = 10; // variable
now equals 10
interestRate = 20; // variable
now equals 20
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2.Constant:
A
constant is similar to a variable in that it provides a named location in
memory to store a data value.
Constants
differ in one significant way in that once a value has been assigned to a
constant it cannot subsequently be changed.
const
int interestRate = 10;
const
int interestRate; // Invalid - a const must be initialized at creation time
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