How can a variable be used in JAVA?

Answer 1

A variable is just a memory location of a value

a variable is accessed by a name

suppose of the integer type u got a variable a

So
DECLARATION-int a;

and then store any integer value to a.

a=4;

or take input from user.
then perform any arithmetic function on a.

a+5;

returns 9;

there are different variables but the essential concept behind variables is the same!

Answer 2

A variable is used to store some data, that will be retrieved later.

In Java, you first have to declare the variable:

int score;

This assumes you want to name your variable "score" (to save the score for a game), and that it will be of type int (integer, or whole number). Then you can assign a value to the variable:

score = 100;

These two parts can be combined into a single statement:

int score = 100;

Later you can do different things with the variable, for example (a) assign the variable to another variable, (b) increment the variable, (c) show it on screen, (d) compare it to some value, etc. Here are examples for these four cases:

(a) x = score;

(b) score += 50; // add 50 points to score

(c) System.out.println("The score is " + score);

(d) if (score >= 1000) ...

A variable is used to store some data, that will be retrieved later.

In Java, you first have to declare the variable:

int score;

This assumes you want to name your variable "score" (to save the score for a game), and that it will be of type int (integer, or whole number). Then you can assign a value to the variable:

score = 100;

These two parts can be combined into a single statement:

int score = 100;

Later you can do different things with the variable, for example (a) assign the variable to another variable, (b) increment the variable, (c) show it on screen, (d) compare it to some value, etc. Here are examples for these four cases:

(a) x = score;

(b) score += 50; // add 50 points to score

(c) System.out.println("The score is " + score);

(d) if (score >= 1000) ...

A variable is used to store some data, that will be retrieved later.

In Java, you first have to declare the variable:

int score;

This assumes you want to name your variable "score" (to save the score for a game), and that it will be of type int (integer, or whole number). Then you can assign a value to the variable:

score = 100;

These two parts can be combined into a single statement:

int score = 100;

Later you can do different things with the variable, for example (a) assign the variable to another variable, (b) increment the variable, (c) show it on screen, (d) compare it to some value, etc. Here are examples for these four cases:

(a) x = score;

(b) score += 50; // add 50 points to score

(c) System.out.println("The score is " + score);

(d) if (score >= 1000) ...

A variable is used to store some data, that will be retrieved later.

In Java, you first have to declare the variable:

int score;

This assumes you want to name your variable "score" (to save the score for a game), and that it will be of type int (integer, or whole number). Then you can assign a value to the variable:

score = 100;

These two parts can be combined into a single statement:

int score = 100;

Later you can do different things with the variable, for example (a) assign the variable to another variable, (b) increment the variable, (c) show it on screen, (d) compare it to some value, etc. Here are examples for these four cases:

(a) x = score;

(b) score += 50; // add 50 points to score

(c) System.out.println("The score is " + score);

(d) if (score >= 1000) ...

Answer 3

A variable is used to store some data, that will be retrieved later.

In Java, you first have to declare the variable:

int score;

This assumes you want to name your variable "score" (to save the score for a game), and that it will be of type int (integer, or whole number). Then you can assign a value to the variable:

score = 100;

These two parts can be combined into a single statement:

int score = 100;

Later you can do different things with the variable, for example (a) assign the variable to another variable, (b) increment the variable, (c) show it on screen, (d) compare it to some value, etc. Here are examples for these four cases:

(a) x = score;

(b) score += 50; // add 50 points to score

(c) System.out.println("The score is " + score);

(d) if (score >= 1000) ...