The sum of the first n integer numbers [using “do while”]

By using a C++ program, we are going to determine the sum of the first “n” positive integers as we use the “do whil”e structure:

void main()
int n, sum=0;
cout<<"Give the last number which will be added to the sum"; cin>>n;
do {
n--;} while (n>0);
cout<<"The given sum is"<< sum;


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