differents between FCs and FBs

What is the main differents between FCs and FBs andwhich case is better to use FBs and which better case to use FCs

FC's are best for calculation and logic that require no static memory or worth monitoring. Example: Finding the highest number or average of 3 numbers.
Value1
Value2
Value3

Temp1 = Value1 + Value2
Temp1 = Value3 + Temp1
Result = Temp1/3
Your not interested in the intermediate results etc.
This would be perfect for FC. I only do the simplest stuff in FC's. I use FB's probably 80% of the time.

If you need timers or other static data FB's are best. I do all my larger code sections in FB's. Multi-Instance FB's I use extensively. Very powerful and efficient.

This is what you need.