In this article, we will learn the C++ program to calculate the arithmetic mean. The arithmetic mean can be calculated by the sum of all the numbers divided by the total number count in a series.

**For Example,** if we have a series of numbers 3, 6, 9, 2, 1. Its arithmetic mean will be the 3+6+9+2+1/5 = 4.2

**Program: Calculate the arithmetic mean in C++**

```
//C++ program to calculate arithmetic mean
#include<iostream>
using namespace std;
int main()
{
float arr[50], sum=0, mean=0;
int number, i;
cout<<"Enter total number in a series? ";
cin>>number;
cout<<"Enter "<<number<<" Numbers:\n";
for(i=0; i<number; i++)
{
cin>>arr[i];
sum=sum+arr[i];
}
mean=sum/number;
cout<<"Arithmetic Mean = "<<mean;
return 0;
}
```