How do you define a number in Java?

How do you declare an integer in Java?

An integer is a whole number — that is, a number with no fractional or decimal portion. Java has four integer types, which you can use to store numbers of varying sizes. The most commonly used integer type is int.

How do you initialize a number in Java?

Java also allows you to initialize a variable on the same statement that declares the variable. To do that, you use an initializer, which has the following general form: type name = expression; In effect, the initializer lets you combine a declaration and an assignment statement into one concise statement.

What is long value in Java?

The long is a numeric data type in Java. This is also the primitive type. The long type takes 64 bits of memory. The maximum value that a long type variable can store is 9,223,372,036,854,775,807L. The minimum value is -9,223,372,036,854,775,808L.

What is a short in Java?

short: The short data type is a 16-bit signed two’s complement integer. It has a minimum value of -32,768 and a maximum value of 32,767 (inclusive). … In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of 232-1.

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What is Integer [] in Java?

In Java, int is a primitive data type while Integer is a Wrapper class. … Integer is a class and thus it can call various in-built methods defined in the class. Variables of type Integer store references to Integer objects, just as with any other reference (object) type.

How do you initialize a value?

More precisely, do the following to initial a variable with the value of an expression:

  1. add an equal sign (=) to the right of a variable name.
  2. to the right of the equal sign, write an expression. It is important to note that all names in the expression must constants or names of constants.

How do you use long value?

Example 1

  1. public class IntegerLongValuetExample1 {
  2. public static void main(String[] args) {
  3. long x = 6666;
  4. long y = 55;
  5. Long i = new Long(x);
  6. Long result = i.longValue()/y;
  7. System.out.println(“Value is = “+result);
  8. }

What is the range of data type in Java?


Type Size Range
byte 8 bits -128 .. 127
short 16 bits -32,768 .. 32,767
int 32 bits -2,147,483,648 .. 2,147,483,647
long 64 bits -9,223,372,036,854,775,808 .. 9,223,372,036,854,775,807

Is Java a camel case?

Java uses CamelCase as a practice for writing names of methods, variables, classes, packages, and constants. … In constants, we do use everything as uppercase and only ‘_’ character is used even if we are combining two or more words in java.

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