백준 8393번 : 합 (Java 11, C++)

 문제 

https://www.acmicpc.net/problem/8393

8393번: 합

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 풀이 - Java 11 

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int sum = 0;
        for (int i = 1; i <= n; i++) {
            sum+=i;
        }
        System.out.println(sum);
    }
}

 풀이 - C++ 

#include <stdio.h>

int main() {
    int n;
    int sum =0;
    scanf("%d", &n);
    
    for (int i = 1; i <= n; i++) {
        sum+=i;
    }
     printf("%d", sum);
    return 0;
}

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 알아야하는 개념