Using variables 1
What is the sum of the first \(n\) positive integers?
We can use the formula \( n(n+1)/2 \) to quickly compute this quantity.
This exercise is part of the course
Data Science R Basics
Exercise instructions
- Define
n<-100 - Then use R to compute the sum of 1 through 100 using the formula \( n(n+1)/2\). What is the sum?
- Make sure you do not erase or change the sample code on DataCamp exercises.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Here is how you compute the sum for the first 20 integers
20*(20+1)/2
# However, we can define a variable to use the formula for other values of n
n <- 20
n*(n+1)/2
n <- 25
n*(n+1)/2
# Below, write code to calculate the sum of the first 100 integers