Program in C++ to display the n terms of even natural number and their sum

Write a program in C++ to display the n terms of even natural number and their sum.

Flowchart of n terms of even natural number and display their sum

Flowchart of C++ Program to display the n terms of even natural number and their sum

C++ Source Code Of program of displaying the n terms of even natural number and their sum

#include<iostream>
using namespace std;
int main()
{
	int j,num,sum=0;
	cout<<"Input number of terms : ";
	cin>>num;
	cout<<"the even numbers are : ";
	j=1 ;
	do 
	{
		cout<<2*j<<endl;
		sum+=2*j;
		j++;
	}
	while(j<=num);
	cout<<"The sum of numbers up to "<<num<<" terms is: "<<sum;
}

#include<iostream>

using namespace std;

int main()

{

int j,num,sum=0;

cout<<"Input number of terms : ";

cin>>num;

cout<<"the even numbers are : ";

j=1 ;

{

cout<<2*j<<endl;

sum+=2*j;

j++;

}

while(j<=num);

cout<<"The sum of numbers up to "<<num<<" terms is: "<<sum;

}

Output

Input number of terms: 5 the even numbers are:2 4 6 8 10 The sum of numbers up to 5 terms is: 30

Exercise

Find the possible mistakes in the following Shamil’s Flow Table of the program of displaying the n terms of even natural number and their sum. Suppose user enter 5

Loop	What lines will execute?	Actual work to do
1 time J=1	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17	Sum += 2j Sum+=21; Sum+=2
2 time J=2	1,2,3,4,5,6,7,8,9,(10,11,12,13,14,15,16)²,17	Sum += 2j Sum+=22; Sum+=6
3 time J=3	1,2,3,4,5,6,7,8,9,(10,11,12,13,14,15,16)³,17	6+=6 Sum=12
4 time J=4	1,2,3,4,5,6,7,8,9,(10,11,12,13,14,15,16)⁴,17	12+=8 Sum=20
5 time J=5	1,2,3,4,5,6,7,8,9,(10,11,12,13,14,15,16)⁵,17	20+=10 Sum=30

If user enter num =0 loop still loop will execute one time

Loop	What lines will execute?	Actual work to do
1 time J=1	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17	Sum=2

Program in C++ to display the n terms of even natural number and their sum
By: Prof. Dr. Fazal Rehman | Last updated: October 21, 2023

Flowchart of n terms of even natural number and display their sum

C++ Source Code Of program of displaying the n terms of even natural number and their sum

Exercise

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