005-001-003

Loops: Number Sum

Medium

Problem Description

Problem Overview

Create a program that inputs a positive integer N and calculates the sum from 1 to N.

Input Format

Receive 1 line of input:

  • Positive integer N (1 or greater)

Output Format

Output in the following format:

Sum from 1 to [N]: [sum]
```java

## Example

Input: 5
Output: Sum from 1 to 5: 15
(Calculation: 1+2+3+4+5=15).

Test Cases

※ Output examples follow programming industry standards

Input:
5
Expected Output:
Sum from 1 to 5: 15
Input:
10
Expected Output:
Sum from 1 to 10: 55
Input:
1
Expected Output:
Sum from 1 to 1: 1
Input:
100
Expected Output:
Sum from 1 to 100: 5050
Input:
3
Expected Output:
Sum from 1 to 3: 6
❌ Some tests failed
❌ エラー発生

Your Solution

Current Mode:● My Code
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
// 入力: N
int n = sc.nextInt();
// すべての値を加算して適切な式を使って合計結果を計算
int sum = 0;
// [のループ] 指定回数繰り返す
for (int i = 1; i <= n; i++) {
sum += i;
}
// 結果をユーザーにコンソール経由で表示
System.out.println("Sum from 1 to " + n + ": " + sum);
}
}

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