How to change rotate property of css using javascript?

Question

No need to expalin.. just write..
Suppose you have that on tag <img>.
U want to create a button to rotate that image on screen...
Create function and so on..
But my question is how to change that...
Like
.
.
function prev() {
var slider = document.getElementById('slider');
num--;
if(num < 0) {
num = images.length-1;
}
***slider.src = images[num];***
}
How write that 3star line for rotate??

Answer 1

Sohanur Rahman ,
What do you mean by "No need to explain.. just write.. "

And please post complete code.
I can't understand what you really asked here.

Answer 2

🇮🇳Omkar🕉 i meant that...
Just write the magic line bro.