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Java Math

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

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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();

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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