[BAEKJOON] 반복문 2439번 - 별 찍기 (2)

📝[2439]

[Java]

1. Scanner 이용

import java.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int N = sc.nextInt();
        
        for(int i=1; i<=N; i++){
            for(int j=1; j<= N-i; j++){
               System.out.print(" ");
            }
            for(int k=1; k<=i; k++){
               System.out.print("*");
            }
            System.out.print("\n");
            //System.out.println();
        }
        
        sc.close();
    }
}

2. BufferedReader 이용

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        int N = Integer.parseInt(br.readLine());
        
        for(int i=1; i<=N; i++){
            for(int j=1; j<= N-i; j++){
               System.out.print(" ");
            }
            for(int k=1; k<=i; k++){
               System.out.print("*");
            }
            System.out.print("\n");
        }
        
        br.close();
    }
}

3. BufferedReader/StringBuilder 이용

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        int N = Integer.parseInt(br.readLine());
        StringBuilder sb = new StringBuilder();
        
        for(int i=1; i<=N; i++){
            for(int j=1; j<= N-i; j++){
               sb.append(" ");
            }
            for(int k=1; k<=i; k++){
               sb.append("*");
            }
            sb.append("\n");
        }
        System.out.print(sb);
        
        br.close();
    }
}

4. BufferedReader/BufferedWriter 이용

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        
        int N = Integer.parseInt(br.readLine());
        
        for(int i=1; i<=N; i++){
            for(int j=1; j<= N-i; j++){
               bw.write(" ");
            }
            for(int k=1; k<=i; k++){
               bw.write("*");
            }
            bw.write("\n");
        }
        br.close();
        
        bw.flush();
        bw.close();
    }
}

---

[Javascript]

const N = Number(require('fs').readFileSync('/dev/stdin').toString().trim());
let str = "";

for(let i=1; i<=N; i++){
    for(let j=1; j<=N-i; j++){
        str += " ";
    }
    for(let k=1; k<=i; k++){
        str += "*";
    }
    str += "\n";
}
console.log(str);

const N = Number(require('fs').readFileSync('/dev/stdin').toString().trim());
let str = "";

for(let i=1; i<=N; i++){
    str += " ".repeat(N-i) + "*".repeat(i) + "\n";
}
console.log(str);

---

[Python]

N = int(input())

for i in range(1, N+1):
    for j in range(1, N-i+1):
        print(" ", end = "")
    for k in range(1, i+1):
        print("*", end = "")
    print()

N = int(input())

for i in range(1, N+1):
    print(" " * (N-i) + "*" * i)