Whats the sum of all even numbers between 2 and 1000

Answer is: 250500

x=0y=0

while (x<=1000) : y + = x x + = 2

print (y)

His allows you to set up a summation of the form:

Summation from i = 1 to 500 of i.

The general solution to the summation of i from 1 to n is n (n+1) / 2. In this case, n = 500.

500 (501) / 2 = 125250

Recall that you divided the sum by 2 to simplify its computation. Now multiply your result by 2 for your final answer:

125250 * 2 = 250500