A quick guide to get the absolute value of the given number in java using Math.abs() method with examples.
1. Overview
In this tutorial, We'll learn how to get the absolute value for the given number in java.
Java API has the handy Math utility class to work with arithmetic and mathematical operations.
Math.abs() method take the number and return the absolute value for the given value. Absolute value means the positive number for the given number. Here, a given number can be a positive value or negative value or zero.
Math.abs() is used to get the positive number for the given value.
2. Math.abs() Syntax
This method is an overloaded method and each takes a different type of data.
Syntax
public static int abs(int a) public static long abs(long a) public static float abs(float a) public static double abs(double a)
abs() method works with primitive number types such as int, long, float and double. Does not work for the char, byte, strings and boolean.
3. Java Absolute Value - Math.abs()
For int and long
abs() method returns the absolute value of an int/long value.
If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.
Note that if the argument is equal to the value of Integer.MIN_VALUE/Long.MIN_VALUE, the most negative representable int value, the result is that same value, which is negative.
For float and double
abs() method returns the absolute value of a primitive float/double value. If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.
Special cases
If the argument is positive zero or negative zero, the result is positive zero.
If the argument is infinite, the result is positive infinity.
If the argument is NaN, the result is NaN.
In other words, the result is the same as the value of the expression.
4. Java Absolute Value Example - Integer/Long
Let us create simple examples using Math.abs() function with integer and long values.
Example 1
This example is on primitive int type values. We have passed positive, negative and 0 to the abs function.
It has returned all positive values as a result.
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample1 {
public static void main(String[] args) {
// for integer primitive values
int i = -100;
int absValueofI = Math.abs(i);
System.out.println("abs value of " + i + " is " + absValueofI);
i = 200;
absValueofI = Math.abs(i);
System.out.println("abs value of " + i + " is " + absValueofI);
i = -0;
absValueofI = Math.abs(i);
System.out.println("abs value of " + i + " is " + absValueofI);
}
}
Output
abs value of -100 is 100 abs value of 200 is 200 abs value of 0 is 0
Example 2
For primitive long values.
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample2 {
public static void main(String[] args) {
// for long primitive values
long l = -100;
long absValueofL = Math.abs(l);
System.out.println("abs value of " + l + " is " + absValueofL);
l = 200;
absValueofL = Math.abs(l);
System.out.println("abs value of " + l + " is " + absValueofL);
l = -0;
absValueofL = Math.abs(l);
System.out.println("abs value of " + l + " is " + absValueofL);
}
}
Output
abs value of -100 is 100 abs value of 200 is 200 abs value of 0 is 0
Example 3
For Wrapper Integer values.
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample3 {
public static void main(String[] args) {
// for Wrapper Integer values
Integer integer = -100;
Integer absValueofInteger = Math.abs(integer);
System.out.println("Integer - abs value of " + integer + " is " + absValueofInteger);
integer = 200;
absValueofInteger = Math.abs(integer);
System.out.println("Integer - abs value of " + integer + " is " + absValueofInteger);
integer = -0;
absValueofInteger = Math.abs(integer);
System.out.println("Integer - abs value of " + integer + " is " + absValueofInteger);
}
}
Output
Integer - abs value of -100 is 100 Integer - abs value of 200 is 200 Integer - abs value of 0 is 0
Example 4
For wrapper Long values
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample4 {
public static void main(String[] args) {
// for Wrapper Long values
Long longValue = -100l;
Long absValueofLong = Math.abs(longValue);
System.out.println("Long - abs value of " + longValue + " is " + absValueofLong);
longValue = 200l;
absValueofLong = Math.abs(longValue);
System.out.println("Long - abs value of " + longValue + " is " + absValueofLong);
longValue = -0l;
absValueofLong = Math.abs(longValue);
System.out.println("Long - abs value of " + longValue + " is " + absValueofLong);
}
}
Output
Long - abs value of -100 is 100 Long - abs value of 200 is 200 Long - abs value of 0 is 0
5. Java Absolute Value Example - Double/Float
Math.abs() method takes the arguments of double and float type.
Example 5
For Double primitive and wrapper types
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample5 {
public static void main(String[] args) {
// for primitive Double values
System.out.println("double primitive");
double doublePrimitive = -100;
Double absValueofDouble = Math.abs(doublePrimitive);
System.out.println("primitive double - abs value of " + doublePrimitive + " is " + absValueofDouble);
doublePrimitive = 200l;
absValueofDouble = Math.abs(doublePrimitive);
System.out.println("primitive double - abs value of " + doublePrimitive + " is " + absValueofDouble);
doublePrimitive = -0l;
absValueofDouble = Math.abs(doublePrimitive);
System.out.println("primitive double - abs value of " + doublePrimitive + " is " + absValueofDouble);
// for Wrapper Double values
System.out.println("\ndouble wrapper");
Double DoubleValue = Double.valueOf(-100);
Double absValueofWrapperDouble = Math.abs(DoubleValue);
System.out.println("Double - abs value of " + DoubleValue + " is " + absValueofWrapperDouble);
DoubleValue = Double.valueOf(100);
absValueofWrapperDouble = Math.abs(DoubleValue);
System.out.println("Double - abs value of " + DoubleValue + " is " + absValueofWrapperDouble);
DoubleValue = Double.valueOf(-0l);
absValueofWrapperDouble = Math.abs(DoubleValue);
System.out.println("Double - abs value of " + DoubleValue + " is " + absValueofWrapperDouble);
}
}
Output
double primitive primitive double - abs value of -100.0 is 100.0 primitive double - abs value of 200.0 is 200.0 primitive double - abs value of 0.0 is 0.0 double wrapper Double - abs value of -100.0 is 100.0 Double - abs value of 100.0 is 100.0 Double - abs value of 0.0 is 0.0
Example 6
For float primitive and wrapper values.
package com.javaprogramto.programs.numbers.math;
public class MathAbsoluteExample6 {
public static void main(String[] args) {
// for primitive Float values
System.out.println("Float primitive");
Float FloatPrimitive = -100f;
Float absValueofFloat = Math.abs(FloatPrimitive);
System.out.println("primitive Float - abs value of " + FloatPrimitive + " is " + absValueofFloat);
FloatPrimitive = 200f;
absValueofFloat = Math.abs(FloatPrimitive);
System.out.println("primitive Float - abs value of " + FloatPrimitive + " is " + absValueofFloat);
FloatPrimitive = -0f;
absValueofFloat = Math.abs(FloatPrimitive);
System.out.println("primitive Float - abs value of " + FloatPrimitive + " is " + absValueofFloat);
// for Wrapper Float values
System.out.println("\nFloat wrapper");
Float FloatValue = Float.valueOf(-100);
Float absValueofWrapperFloat = Math.abs(FloatValue);
System.out.println("Float - abs value of " + FloatValue + " is " + absValueofWrapperFloat);
FloatValue = Float.valueOf(100);
absValueofWrapperFloat = Math.abs(FloatValue);
System.out.println("Float - abs value of " + FloatValue + " is " + absValueofWrapperFloat);
FloatValue = Float.valueOf(-0l);
absValueofWrapperFloat = Math.abs(FloatValue);
System.out.println("Float - abs value of " + FloatValue + " is " + absValueofWrapperFloat);
}
}
Output
Float primitive primitive Float - abs value of -100.0 is 100.0 primitive Float - abs value of 200.0 is 200.0 primitive Float - abs value of -0.0 is 0.0 Float wrapper Float - abs value of -100.0 is 100.0 Float - abs value of 100.0 is 100.0 Float - abs value of 0.0 is 0.0
6. Conclusion
In this article, We've seen how to get the absolute value for the given number in java. Math.abs() method takes long, float, int and double types and returns its absolute values.
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