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

Write a program in C++ to display the n terms of odd natural number and their sum like: 1 3 5 7 … n.

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

C++ Source Code

#include<iostream>
using namespace std;
int main()
{
	int n,sum=0,i,t;
	cout<<"enter the number :";
	cin>>n;
		i=1;
	do
	{
		cout<<2*i-1<<" ";
		sum=sum+2*i-1;
		i++;
    }
    while(i<=n);
   	cout<<"\n the sum of an odd numer is "<<sum;
}

#include<iostream>

using namespace std;

int main()

{

int n,sum=0,i,t;

cout<<"enter the number :";

cin>>n;

i=1;

{

cout<<2*i-1<<" ";

sum=sum+2*i-1;

i++;

}

while(i<=n);

cout<<"\n the sum of an odd numer is "<<sum;

}

Output enter the number: 5 1 3 5 7 9 the sum of an odd number is 25.

Excercise

Find the possible mistakes in the following Shamil’s Flow Table of the program to display the n terms of odd natural number and their sum.

Loop	condition	What lines will execute?	Actual work to do
Time 1 I=1	T	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15	Sum = sum+i *0=0+(21-1)**
Time 2 I=3	T	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,15, 9, 10, ,11,12,13,14,15	Sum = sum+i *1=1+(22-1)**
Time 3 I=5	T	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,15, 9, 10, ,11,12,13,14,15	Sum = sum+i *3=3+(23-1)**
Time 4 I=7	T	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,15, 9, 10, ,11,12,13,14,15,16,17	Sum = sum+i *5=5+(24-1)**

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

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

Excercise

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