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Java Math


The Java Math class has many methods that allows you to perform mathematical tasks on numbers.


Math.max(x,y)

The Math.max(x,y) method can be used to find the highest value of x and y:

Example

Math.max(5, 10);

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Math.min(x,y)

The Math.min(x,y) method can be used to find the lowest value of of x and y:

Example

Math.min(5, 10);

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Math.sqrt(x)

The Math.sqrt(x) method returns the square root of x:

Example

Math.sqrt(64);

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Math.abs(x)

The Math.abs(x) method returns the absolute (positive) value of x:

Example

Math.abs(-4.7);

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Random Numbers

Math.random() returns a random number between 0.0 (inclusive), and 1.0 (exclusive):

Example

Math.random();

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To get more control over the random number, e.g. you only want a random number between 0 and 100, you can use the following formula:

Example

int randomNum = (int)(Math.random() * 101);  // 0 to 100

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Complete Math Reference

For a complete reference of Math methods, go to our Java Math Methods Reference.


Test Yourself With Exercises

Exercise:

Use the correct method to find the highest value of x and y.

int x = 5;
int y = 10;
Math.(x, y);

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