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Java How To Generate Random Numbers

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Core idea

What is the main idea behind Java How To Generate Random Numbers?

Lesson checks

Practice each idea before moving on

Short Mimo-style checks built from this lesson's code, terms, and sequence.

1Quick choice

Which statement best captures the main point of this lesson?

2Fill blank

Complete the missing token from the example code.

___.random();

How To Generate a Random Number

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

Related Pages

Java Math Reference

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