Exercise 6
sum of the first n positive integers
Write a program that computes the sum of the first \(n\) positive integers, where \(n\) is specified by the user. Let's assume for now that \(n>0\) and \(n<500\). Test it on \(n=5\), \(n=50\) and \(n=500\), the output should be:
the sum of the first 5 positive integers is: 15 the sum of the first 50 positive integers is: 1275 the sum of the first 500 positive integers is: 125250
