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
C++ Source Code Of program of displaying the n terms of even natural number and their sum
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#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; } |
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
Excercise
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 += 2*j
Sum+=2*1; 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 += 2*j
Sum+=2*2; 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 |
Video Lecture
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I welcome to all of you if you want to discuss about any topic. Researchers, teachers and students are allowed to use the content for non commercial offline purpose. Further, You must use the reference of the website, if you want to use the partial content for research purpose.
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