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

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