I need to know how to set a min and max to a slider variable in scratch 3.0

right click and change slider range

Now, I'm no expert, but you could try this..

Make a variable, title them min and max.

If >variable< is less than min..

Set >Varible< to (a number)

Now for max.

If >variable< is MORE than max..

Set >Varible< to (a number)

I don't know. Worth a shot.

Right-click the variable you want to change the slider range for, and press change slider range.

Now: you should be presented with a similar screen.

right click the variable and then change slider range

I'm assuming you already know how to create a slider variable:
Right click the slider box and then a list should drop down. Out of all of these, select “change slider range” and set the minimum and maximum values.

Thanks.