In Java script

Write a program that asks user for a positive integer value. The program should use a loop to get the sum of all integers from 1 up to the number.

For eg if the user enters 40, it should find the sum of 1 to 40

Output Enter a positive nonzero number: 40 The sum of all the integers from 1 through 40 is 820

Validation should be done if it is a non negative number Enter a positive nonzero number: -20 Invalid. Enter a positive nonzero number: 20 The sum of all the integers from 1 through 20 is 210