A variable is a memory address that holds a value. A constant is simply a variable that does not change value.
Without variables, you won't be able to do much programming. Variables is where you store data; such data may change over time. And computer programming is all about manipulating data.
In Java toUppercase() is a method of the class String: https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toUpperCase()
Java does not have the concept of Reference Variables. We cannot access the memory location where the data is stored in Java.
Enum in java is a keyword which is introduced in JDK 1.5 and its a type like Interface and Class.Enum constants are implicitly static and final and you can not change there value once created. Enum in Java provides type-safety and can be used inside switch statment like int variables. Since enum is a keyword you can not use as variable name and since its only introduced in JDK 1.5 all your previous code which has enum as variable name will not work and needs to be refactored.
Literals are constants.
Variables change, constants do not.
The Math class has public variables - defined as final, of course - for the mathematical constants PI and E.
Without variables, you won't be able to do much programming. Variables is where you store data; such data may change over time. And computer programming is all about manipulating data.
constant is does not change the value of during the excution of programvariable it changes the value during the excution of program
Constants are fixed numbers that never change, they always stay the same. Variables are number that can change, they 'Vary'.
In Java toUppercase() is a method of the class String: https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toUpperCase()
The ones called constants.
ask your father
to store values
Constants stays the same independent variables is the variable that is being manipulated
Java does not have the concept of Reference Variables. We cannot access the memory location where the data is stored in Java.
Constants stays the same independent variables is the variable that is being manipulated