How to Do Division in Java (Integer and Floating Point)

Co-authored by Nicole Levine, MFA Reviewed by Luigi Oppido

Last Updated: February 7, 2024 Fact Checked

There are two types of division in Java—integer division and floating-point division. Both types use the forward slash (/) symbol as the operator, following the format dividend / divisor . ^{[1]
X
Research source} Read on to learn how to divide two integers (non-decimal whole numbers) to receive an integer quotient, and how to use floating point division to get a decimal result.

Method 1

Method 1 of 2:

Integer Division

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1
When you divide two integers in Java, the fractional part (the remainder) is thrown away. For example, if you were to divide 7 by 3 on paper, you'd get 2 with a remainder of 1. But when you divide two integers in Java, the remainder will be removed and the answer will just be 2. ^{[2]
X
Research source} To use integer division, you'd use this syntax:
```
 int 
 a 
 = 
 7 
 ; 
 int 
 b 
 = 
 3 
 ; 
 int 
 result 
 = 
 a 
 / 
 b 
 ; 
 // result will be 2 
```
- Dividing two integers always results in an integer. If you want to get a decimal result from dividing two integers, use floating point division .
- If you try to divide an integer by 0 using integer division, you'll get an ArithmeticException error at runtime, even if the program compiles fine. ^{[3]
  X
  Research source}

Method 2

Method 2 of 2:

Floating point division

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1
If either operand in the equation is of the float or double type, you'll need to use float division. You can also use float division if you are dividing two numbers and want a decimal result. To use this division type, set the dividend and divisor to a float. ^{[4]
X
Research source} With our example of 7 divided by 3, our code would look like this:
```
 float 
 a 
 = 
 7.0f 
 ; 
 float 
 b 
 = 
 3.0f 
 ; 
 int 
 result 
 = 
 a 
 / 
 b 
 ; 
 // result will be 2.33 
```
- When dividing by zero with floating point division, the result will be NaN (Not a Number). ^{[5]
  X
  Research source}

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If 'a' variable is divisible by 2 then print 'a' is even otherwise print odd.

Jessie

Community Answer

Complexified: if (a%2 == 0) { System.out.println("even"); } else { System.out.println("odd"); Ternary Operator: System.out.println((a%2 == 0) ? "even" : "odd"); Explanation: "%" is "Modulus", which returns the remainder after dividing the two numbers. Only even numbers can be divided by two without remainder (0). Ternary: You can put ternary operators (([condition]) ? [statement if true] : [statement if false]) in a println() function but you can't put println() functions in ternary operators

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When dividing mixed integer and floating point numbers, the floating point values ( float or double ) are automatically converted to the double type when dividing. ^{[6]
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How to Do Division in Java (Integer and Floating Point)

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