for loop: Sum from 1 to N

In this problem, you will create a program that reads an integer N from standard input, uses a for loop to sequentially add integers from 1 to N, and displays the total to standard output.

Learning Objective: Understand repetitive processing and cumulative calculation using for loops

Overview

Create a program that reads an integer N, uses a for loop to calculate the sum of integers from 1 to N, and outputs the result.

Specifications

• Read integer N from standard input
• Use a for loop to iterate through numbers 1 to N
• Accumulate each number
• Output the final sum

Input Format

N

• N: A positive integer (upper bound for summation)

Output Format

Sum: total

Examples

Input	Output
10	Sum: 55
5	Sum: 15

Note

For example, when N=10: 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55