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  Tutorial: Numbers

There are basically two kinds of numbers in Java and most other programming languages: binary integers (most commonly using the type int) and binary floating-point numbers (most commonly using the type double).

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Two kinds of numbers. There are basically two kinds of numbers in Java and most other programming languages: binary integers (most commonly using the type int) and binary floating-point numbers (most commonly using the type double). Although these numbers are stored in the computer as binary numbers, you will usually use decimal numbers in your Java source program, and the Java compiler translates them to the equivalent binary form.

Floating-point numbers can have a fractional part and we usually write them with a decimal point, for example, 3.14159265, 0.01, -4.0.

Integers are "whole numbers" and can not have a fractional part. for example, 3, 0, -4.


 

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