Random in JavaScript
In JavaScript, the Math.random() method is used to generate a random floating-point number between 0 (inclusive) and 1 (exclusive).
Syntax
The syntax of the Math.random() method is as follows:
Math.random()
Example
The following example demonstrates how to use the Math.random() method to generate a random number between 0 and 1:
console.log(Math.random()); // 0.12345678901234567
In the above example, the Math.random() method returns a random floating-point number between 0 (inclusive) and 1 (exclusive).
Generate Random Number within a Range
To generate a random number within a specific range, you can use the following formula:
Math.floor(Math.random() * (max - min + 1)) + min
Where min is the minimum value and max is the maximum value.
The following example demonstrates how to generate a random number between 1 and 10:
console.log(Math.floor(Math.random() * (10 - 1 + 1)) + 1); // 5
In the above example, the Math.floor(Math.random() * (10 - 1 + 1)) + 1 expression generates a random number between 1 and 10.
Generate Random Integer
To generate a random integer within a specific range, you can use the following formula:
Math.floor(Math.random() * (max - min + 1)) + min
Where min is the minimum value and max is the maximum value.
The following example demonstrates how to generate a random integer between 1 and 10:
console.log(Math.floor(Math.random() * (10 - 1 + 1)) + 1); // 5
In the above example, the Math.floor(Math.random() * (10 - 1 + 1)) + 1 expression generates a random integer between 1 and 10.
A property of Math.random() method
The Math.random() method returns a random floating-point number between 0 (inclusive) and 1 (exclusive).
The Math.random() method returns a random number between 0 (inclusive) and 1 (exclusive).
Conclusion
In this tutorial, you learned how to use the Math.random() method to generate random numbers in JavaScript. You also learned how to generate random numbers within a specific range and how to generate random integers.