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:

Math.max(5, 10);

Math.min(x,y)

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

Math.min(5, 10);

Math.sqrt(x)

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

Math.sqrt(64);

Math.abs(x)

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

Math.abs(-4.7);

Random Numbers

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

Math.random();

To get more control over the random number, for example, if you only want a random number between 0 and 100, you can use the following formula:

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

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