Divide by Zero in Java
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Division by zero is a fundamental mathematical operation that is undefined. In this article we will learn and understand with example how to divide any number by zero results in specific behaviors depending on the data type. Let's explore how division by zero is handled in Java across different data types and scenarios.
Example 1 : Integer Division (int, long, etc.)
Whenever we perform zero division with integer in java results is an ArithmeticException being thrown at runtime.
public class Program
{
public static void main(String []args)
{
System.out.println("10/0 = "+ 10/0);
//OR
System.out.println("10L/0 = "+ 10L/0);
}
}Exception in thread "main" java.lang.ArithmeticException: / by zero at Program.main
Handling Division by Zero
public class Program
{
public static void main(String []args)
{
int numerator =10;
int denominator =0;
try {
int result = numerator / denominator;
System.out.println("Result: " + result);
} catch (ArithmeticException e) {
// Handle the exception or log it as per your application's needs
System.err.println("Division by zero is not allowed.");
}
}
}Division by zero is not allowed.
Preventing Division by Zero
public class Program
{
public static void main(String []args)
{
int numerator =10;
int denominator =0;
if(denominator != 0) {
int result = numerator / denominator;
System.out.println("Result: " + result);
} else {
// Handle the exception or log it as per your application's needs
System.err.println("Division by zero is not allowed.");
}
}
}Division by zero is not allowed.
Example 2 : floating-point numbers (float and double)
Whenever we are trying to perform zero division with float and double in Java, results in special floating-point values rather than causing a runtime exception like ArithmeticException for integers.it depends on the numeric type (float or double) and the direction of the division (positive or negative).
Positive Infinity :-public class Program
{
public static void main(String []args)
{
System.out.println("10/0.0 = "+ (10/0.0) );
System.out.println("10L/0.0 = "+ (10L/0.0) );
System.out.println("10f/0.0 = "+ (10/0.0) );
System.out.println("10f/0 = "+ (10f/0) );
System.out.println("10f/-0 = "+ (10f/-0) );
System.out.println("-10/-0f = "+ (-10/-0f) );
System.out.println("10.1/0.0 = "+ (10.1/0.0) );
System.out.println("10.1/0 = "+ (10.1/0) );
System.out.println("10.1/-0 = "+ (10.1/-0) );
System.out.println("-10.1/-0.0 = "+ (-10/-0.0) );
}
}10/0.0 = Infinity 10L/0.0 = Infinity 10f/0.0 = Infinity 10f/0 = Infinity 10f/-0 = Infinity -10/-0f = Infinity 10.1/0.0 = Infinity 10.1/0 = Infinity 10.1/-0 = Infinity -10.1/-0.0 = Infinity
Negative Infinity :-
public class Program
{
public static void main(String []args)
{
System.out.println("10/-0.0 = "+ (10/-0.0) );
System.out.println("10L/-0.0 = "+ (10L/-0.0) );
System.out.println("10f/-0.0 = "+ (10f/-0.0) );
System.out.println("-10f/0.0 = "+ (-10f/0.0) );
System.out.println("-10f/0 = "+ (-10f/0) );
//System.out.println("10f/-0 = "+ (10f/-0) ); +Infinity
System.out.println("10.1/-0.0 = "+ (10.1/-0.0) );
System.out.println("-10.1/0.0 = "+ (-10.1/0.0) );
System.out.println("-10.1/0 = "+ (-10.1/0) );
//System.out.println("10.1/-0 = "+ (10.1/-0) ); +Infinity
}
}10/-0.0 = -Infinity 10L/-0.0 = -Infinity 10f/-0.0 = -Infinity -10f/0.0 = -Infinity -10f/0 = -Infinity 10.1/-0.0 = -Infinity -10.1/0.0 = -Infinity -10.1/0 = -Infinity
NaN (Not a Number)
public class Program
{
public static void main(String []args)
{
System.out.println("0/0.0 = "+ (0/0.0) );
System.out.println("0/-0.0 = "+ (0/-0.0) );
System.out.println("-0/0.0 = "+ (-0/0.0) );
System.out.println("-0/-0.0 = "+ (-0/-0.0) );
System.out.println("0/0f = "+ (0/0f) );
System.out.println("0/-0f = "+ (0/-0f) );
System.out.println("-0/0f = "+ (-0/0f) );
System.out.println("-0/-0f = "+ (-0/-0f) );
}
}0/0.0 = NaN 0/-0.0 = NaN -0/0.0 = NaN -0/-0.0 = NaN 0/f = NaN 0/-0f = NaN -0/0f = NaN -0/-0f = NaN
Zero With Negative Sign
public class Program
{
public static void main(String []args)
{
System.out.println("-0 = "+ (-0) );
System.out.println("-0L = "+ (-0L) );
System.out.println("-0f = "+ (-0f) );
System.out.println("-0.0 = "+ (-0.0) );
}
}-0 = 0 -0L = 0 -0f = -0.0 -0.0 = -0.0