# From user input, using lambda
# pass string directly to lambda
print((lambda s: sum(range(int(s[0]), int(s[1])+1)))(input().split()))
# or, convert string to list then pass into lambda
print((lambda s: sum(range(s[0], s[1]+1)))(list(map(int, input().split()))))
# input: 1 100
# output: 5050
# Or, simply, from variables
a, b = 1, 100
print(sum(range(a, b+1)))//Java program to print the sum of numbers in a given rangeimport java.util.Scanner;public class sum_of_numbers_in_range{ public static void main(String[] args) { //scanner class declaration Scanner sc = new Scanner(System.in); //input from user System.out.print("Enter starting number : "); int start = sc.nextInt(); System.out.print("Enter ending number : "); int end = sc.nextInt(); //declare a variable to store sum int sum = 0; //loop to add n natural numbers for(int i = start ; i <= end ; i++) sum=sum+i; //display the sum System.out.print("Sum of numbers in the range from "+start+" to "+end+" is "+sum); //closing scanner class(not compulsory, but good practice) sc.close(); }}