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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Random Number Challenge Solution

Walter Young
PLUS
Walter Young
Courses Plus Student 3,523 Points
Posted by Walter Young
Walter Young
Courses Plus Student 3,523 Points

How do I create a random number that doesn't include the two given values?

I took things one step further and used Math methods so the order of upper/lower shouldn't matter:

function ranNumRange(x,y) { return Math.floor(Math.random() * (Math.abs(x - y) + 1) + Math.min(x,y)); }

However, if I put, say, (5,3) or (3,5) the program can also return the two given values. Values with larger differences seem to be fine. What is the most elegant (minimal code) way to fix this?

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

You can revise the formula to exclude the limit values from the range instead of including them:

Math.floor(Math.random() * (Math.abs(x - y) - 1)) + Math.min(x,y) + 1