JAVA

declare variables java

/* Depending on what variables you want to declare */
String hello = "hello"; //characters
short one = 12;//shorter integers
int two = 2000; //complete integer up too 32 bits
long number = 2000000; //complete integer up to 64 bits
float decimal = 1.512 //up to 7 decimal digits
double million = 1.387892847395 //up tp 16 decmial digits
Bool condition = true; // true or false
char a = "a"; // unicode character

what is var in java

The var keyword was introduced in Java 10. 
Type inference is used in var keyword in which it detects automatically 
the datatype of a variable based on the surrounding context. 
The below examples explain where var is used and also where you can’t use it.
  

// Java program to explain that
// var can used to declare any datatype
  
class Demo1 {
  
    public static void main(String[] args)
    {
  
        // int
        var x = 100;
  
        // double
        var y = 1.90;
  
        // char
        var z = 'a';
  
        // string
        var p = "tanu";
  
        // boolean
        var q = false;
  
        // type inference is used in var keyword in which it
        // automatically detects the datatype of a variable
        System.out.println(x);
        System.out.println(y);
        System.out.println(z);
        System.out.println(p);
        System.out.println(q);
    }
}

variables in java

class Variables {
    public static void main(String[] args) {
        String msg = "Hello World"; // Strings
        int number = 10; // Integers
        float decimal = 7.369f; // Make sure to end the decimal with an f.
        char letter = 'A'; // Characters
        boolean result = true; // Booleans
    }
}

what are variables in java

//variable is a container which holds the value//
//ex://
var characters = document.getElementbyID('character').value;
//above the variable is characters and value is character//

java variable

//this are the most common ones
int x = 5; 
String y = "hello";
System.out.println(x + y);

Declaring Java Variables

class HelloWorld {
    public static void main(String[] args) {
String a = "aaaa";
int num = 123;
final String cons = "I am constant";

System.out.print(a);
System.out.print(num);
System.out.print(cons);
    }
}

why use var in java

improve the readability of code for other developers who read the code. 
In some situations

how to create a variable java

int myVariable = 42;    //This is the most commonly used variable. Only use other variables if you have a good reason to.