Sum of numbers from A to B

JavaScript Easy loops

Task «Sum of numbers from A to B»

Write a program that takes two integers A and B and uses a loop to calculate the sum of all integers from A to B inclusive. It is guaranteed that A ≤ B.

Input Format

Two integers A and B, each on a separate line.

Output Format

One integer — the sum of numbers from A to B.

Examples

Example 1

INPUT

1
10

OUTPUT

55

Example 2

INPUT

1
100

OUTPUT

5050

main.js