Question

Q Basic program sum of first n even numbers
please someone say​

Answer 1

Answer:

To find sum of even numbers we need to iterate through even numbers from 1 to n. Initialize a loop from 2 to N and increment 2 on each iteration. The loop structure should look like for(i=2; i<=N; i+=2) . Inside the loop body add previous value of sum with i i.e. sum = sum + i .

Explanation:

hope it helps

Answer 2

To find sum of even numbers we need to iterate through even numbers from 1 to n. Initialize a loop from 2 to N and increment 2 on each iteration. The loop structure should look like for(i=2; i<=N; i+=2) . Inside the loop body add previous value of sum with i i.e. sum = sum + i .

Example :

Input : n = 4

Output : 20

Sum of first 4 even numbers

= (2 + 4 + 6 + 8) = 20  

Input : n = 20

Output : 420