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:
• JavaScript to Add and Remove Rows and Cells from a Table
• Easy JavaScript Form Design
• Calculators For Your Web Site : Length Units Converter
• Java Script Code to Factor Numbers
• Code to Fade Between Two different Pictures
• Calculators For Your Web Site
• Java Script Code for Directory File List
• How to Disable the Browser Back Button
• How to Shuffle the Deck With Java Script
• Easy Expanding Banner Code