Welcome to Bucaro TecHelp!

Bucaro TecHelp
Maintain Your Computer and Use it More Effectively
to Design a Web Site and Make Money on the Web

About Bucaro TecHelp About BTH User Agreement User Agreement Privacy Policy Privacy Site Map Site Map Contact Bucaro TecHelp Contact RSS News Feeds News Feeds

JavaScript to Generate a Random Number Between X and Y

You can use the JavaScript Math object's .random() method to generate a random number between two values, but because it returns a (pseudo) random floating-point number between 0 and 1 (but not including 1), you'll need to perform some additional operations on it to scale it to your required range.

To generate a random integer between two values x and y use the code shown below:

Math.floor((Math.random() * y) + x);

x being the lowest value, and y being the highest value.

For example if you wanted to generate a random integer between 1 and 8, you would use:

Math.floor((Math.random() * 8) + 1);

The Math.floor() function returns the largest integer less than or equal to the passed argument.

If the lowest random integer that you require is 0, you can simplify the statement as shown below:

Math.floor(Math.random() * max);

To generate a random floating-point number between two values x and y you would use the code shown below:

return Math.random() * (max-min) + min;

More Java Script Code:
• Four Ways to Use Java Script Event Handlers
• Calculators for Your Web Site : Body Mass Index
• JavaScript to Set Checkbox to Readonly
• Using the Java Script Date Object
• Java Script Code to Move Items Between Select Lists
• HTML5 Canvas JavaScript Code to a Draw Bezier Curve
• Easy Java Script Butterfly Animation
• Calculators for Your Website : Decimal to Hexidecimal Converter
• How to Shuffle the Deck With Java Script
• How to Place Image on HTML5 Canvas

RSS Feed RSS Feed

Follow Stephen Bucaro Follow @Stephen Bucaro



Fire HD
[Site User Agreement] [Privacy Policy] [Site map] [Search This Site] [Contact Form]
Copyright©2001-2018 Bucaro TecHelp 13771 N Fountain Hills Blvd Suite 114-248 Fountain Hills, AZ 85268