Enter a min value: 1 Enter a min value: 50 Random value between 1 and 50 is 47. This function generates a floating-point number between 0 and 1 (including 0, excluding 1) and can be used as the base for calculating other random values. For weighted random or normal distributed random with JavaScript, read this article instead. let’s say we want a random number between 1 and 100. Conclusion. 1431. Using this equation the returned value is a random number between min and max. We can even generate a number between specified numbers such as between 1 and 10, between 0 and 100, etc. In this post, we will fetch a random integer between two numbers we define. javascript by Wicked Wallaby on Jan 04 2020 Donate . If we also want to have a user-defined minimum value, we need to change the equation of Math.random() * max to Math.random() * (max-min)) +min. In JavaScript, you can use the Math. When Math.random() is executed, it returns a random number that can be anywhere between 0 and 1. In JavaScript, to get a random number between 0 and 1, use the Math.random () function. Return integer between min and max (inclusive) Negative numbers are supported. Generate random integers between 0 and 9. To increase the range to, say, 100, simply change 11 to 101 instead. JavaScript Math floor () In JavaScript, you can generate a random number with the Math.random () function. Method 1: Using Math.random() function: The Math.random() function is used to return a floating-point pseudo-random number between range [0,1) , 0 (inclusive) and 1 (exclusive). This random number can then be scaled according to the desired range. Math.random () returns a random floating-point number ranging from 0 to less than 1 (inclusive of 0 and exclusive of 1) Example 1: Generate a Random Number This function can generate a random integer number between (and including) min and max numbers: function randomNumber(min, max) { if (min > max) { let temp = max; max = min; min = temp; } if (min <= 0) { return Math.floor(Math.random() * (max + Math.abs(min) + 1)) + min; } else { return Math.floor(Math.random() * (max - min + 1)) + min; } } JavaScript - The Complete Guide 2020 (Beginner + Advanced) We can use Math.floor and Math.random () method to generate a random number between two numbers where both minimum and the maximum value is included in the output. This number return always less than 1 as a result. Adding 1 to max-min will include the max in range and Math.floor() will always guarantee that this value is not more than the max.