Hello,

I was using the integral function in root for calculating the area under a histogram in between two bins.

```
double area=hist->Integral(hist->FindBin(0), hist->FindBin(5));
```

I felt little confused what is being calculated here. Is it the sum of bin contents between the two limits? Or is it the literal geometrical area? sum(bincontent * binwidth) ? My strong guess is that it is the first way and I was wondering if there is any distinction for the integral function to calculate the literal geometric area and the sum of bin contents

*ROOT Version:* 6.26

*Platform:* Ubuntu 22.04

*Compiler:* gcc