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JavaScript JavaScript Basics (Retired) Working With Numbers The Random Challenge Solution

Posted by Colin Hartmann
Colin Hartmann
Courses Plus Student 2,875 Points

Why Math.random doesn't have any input in the function parentheses

In the code solution, for my code, I put the user's input within the Math.random() parentheses (so it would look like Math.random(/user input/)

Why do you not put the user's input within the Math.random function?

1 Answer

Samuel Webb
Samuel Webb
25,370 Points
Samuel Webb
Samuel Webb
25,370 Points

Because Math.random() doesn't need an argument. What you'd want to do is Math.random * userInput. Math.random() returns a random number between 0 and 1. So you want to multiplay it by whatever the user's input is. You could also do Math.floor(Math.random() * userInput) or `Math.ceil(Math.random() * userInput)' to get a whole number (integer).

Colin Hartmann
Colin Hartmann
Courses Plus Student 2,875 Points

What would the code be saying if I typed Math.random(userInput)?

Samuel Webb
Samuel Webb
25,370 Points
Samuel Webb
Samuel Webb
25,370 Points

It won't say anything. It'll just give you the random number it would have given you regardless.

Colin Hartmann
Colin Hartmann
Courses Plus Student 2,875 Points

Ok thx

Samuel Webb
Samuel Webb
25,370 Points
Samuel Webb
Samuel Webb
25,370 Points

To learn more about Math in JS, check out the Documentation Here