How to do division in Java (integer and floating point value)

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There are two types of division in Java—integer division and floating point division (also known as remainder division). Both of these calculations use the up slash (/) as the operator in the divisor / divisor formula. This wikiHow teaches you how to divide two integers (without a decimal point) to get an integer quotient, and how to perform floating point division to get a decimal result.

Table of Contents

Steps

Integer division

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When dividing two integers in Java, the decimal part (or remainder) is dropped. For example, if you divide 7 by 3 on paper, you get 2 and a remainder of 1. But when you divide two integers in Java, the remainder is omitted and the result is only 2. ^[1] To perform integer division, you need to use the following syntax:

 int a = 7 ; int b = 3 ; int result = a / b ; // result will be 2

• Division of two integers always returns an integer. If you want to get a decimal result when dividing two integers, perform floating point division.
• If you apply integer division to divide an integer by zero, you’ll get an ArithmeticException at runtime, even if the program compiles well. ^[2]

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Floating point division

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If the operands in the equation are of type float or double, you need to use remainder division. You can also apply remainder division if you are dividing two numbers and want to get the remainder. To perform this type of division, put the divisor and divisor in the float division syntax. ^[3] With the 7 divided by 3 example, your code would look like this:

 float a = 7.0f ; float b = 3.0f ; int result = a / b ; // result will be 2.33

• When using remainder division to divide by 0, the result will be NaN (not a number). ^[4]

Advice

• When performing mixed division of integers and floating-point reals, floating-point values ( float or double ) are automatically converted to double when dividing. ^[5]

There are two types of division in Java—integer division and floating point division (also known as remainder division). Both of these calculations use the up slash (/) as the operator in the divisor / divisor formula. This wikiHow teaches you how to divide two integers (without a decimal point) to get an integer quotient, and how to perform floating point division to get a decimal result.

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