I would like help understanding the solution to the exercise given for this lecture. More specifically, I do not understand the second body of code.

Hi Cyrene, in the exercise we're tasked with finding the sum of all numbers from i to n. Our example shows the solution with i = 1, n = 10. So, we're looking for the sum of all numbers from 1 to 10, which is 55 = 1 + 2 + ...+10 Here is the code: while(i <= n){ sum <- sum + i i <- i + 1 print(sum) } Let's break it down Line 1 : We compute the sum with a while loop, and the condition i<=n. Line 2 : Then we compute the current sum, as :sum = sum + i Line 3 : And we increase our current i with 1. Line 4 : For convenience we print out the current sum with each iteration The algorithm terminates when the while condition isn't TRUE anymore. Hence, when i becomes 11. Leaving us with what we wanted from the beginning: the sum of all numbers from i to n. Best, Eli

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Cyrene Azzarouk

Last answered:

May 07, 2020

Posted on:

May 02, 2020

While Loop in R

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Elitsa Kaloyanova

Posted on:

May 07, 2020

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