(C ++ ) (using loop, without using void command) Write a program that asks the u

Question

(C ++ ) (using loop, without using void command)

Write a program that asks the user for a positive integer value by prompting "Enter a positive integer number: ", read in that number, then use a loop to get the sum of all the integers from 1 up to the number entered. For example, if the user enters 50, the loop will find the sum of 1, 2,3, 4…50. It should print "The total of all the integers from 1 to 50 is …"

Input validation: when user enters a invalid number, the program should prompt user "The number cannot be less than one."

Explanation / Answer

#include <iostream>

using namespace std;

int main()
{
int n;
cout<<"Enter a positive integer number: "<<endl;
cin >> n;
while(n<=0) {
cout<<"The number cannot be less than one. Enter a positive integer number: "<<endl;
cin >> n;
}
int sum = 0;
for(int i=1;i<=n;i++) {
sum+=i;
}
cout<<"The total of all the integers from 1 to "<<n<<" is "<<sum<<endl;
return 0;
}

Output:

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