sumofnumber.cpp

#include <iostream> 
using namespace std; 

int main(){
	int n1, n2; 
	
	cout << "We will calculate the sum of integers in the range you provide.\n"; 
	cout<< "Please give us the lower bound: \n"; 
	cin>> n1; 
	cout<< "Please give us the upper bound: \n"; 
	cin>> n2;
	int c= n1;
	int sum=0;
	do{
		sum=sum+c;
		c=c+1;
	}while(c<=n2);
		cout << "The sum from " << n1 << " to " << n2 << "is " << sum; 
	
	return 0; 
	
	}