I can code symbols of the type $$\prod_{i=1}^{n}$$
but when it comes to:
I cannot get the less-than-equal sign placed as shown.Can this be done easily?
EDIT: below removed as reason explained in the comments
**not sure why $\prod_{i=1}^{n}$ not displaying properly while in math.stackexchange its fine*
Best Answer
If it's for in-line mathematics, you can use
but be aware this may slightly increase the vertical spacing with the line below.