Menu
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;


Learn more at amazon.com

More Java Script Code:
• Easy Java Script Code to Fill Array With Random Numbers
• Make Your Own Graphical Digital Clock
• Calculators For Your Web Site : Length Units Converter
• Easy Code to Add Mouse Trails to Your Webpage
• Regular Expressions Lookarounds
• JavaScript 24-Hour Trainer
• Java Script Comparison Operators
• A Brief Introduction to HTML for JavaScript Programmers
• Java Script Code to Re-arrange Items in a Select List
• Calculators for Your Website : Fahrenheit to Celsius Converter