JAVA 별찍기 - 3 (정 삼각형, 역삼각형, 다이아몬드)

for (int i = 0; i < 5; i++) {         for (int j = 4; j > i; j--) { // i = 0 j = 4,3,2,1                                       // i = 1 j = 4,3,2                                       // i = 2 j = 4,3                                       // i = 3 j = 4                                       // i = 4 --> j는 4부터 시작하여 i보다 클때까지 - 시키는데 4는 j와 같으므로 제외             System.out.print(" ");         }         for (int k = 1; k <= i*2+1; k++) {//k는 1부터 시작             System.out.print("*"); //  i 가  0 -->0*2+1 1 1  =         1                                      // i 가 1 -->1*2+1  3 3 <=       1,2,3                                     // i 가 2 -->2*2+1  5 5 <=     1,2,3,4,5                                     // i 가 3 -->3*2+1  7 7 <=   1,2,3,4,5,6,7                                     // i 가 4 -->4*2+1  9 9 <= 1,2,3,4,5,6,7,8,9                                                                      }         System.out.println();     }      Colored by Color Scripter

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for (int i = 0; i < 5; i++) {             for (int j = 1; j <= i; j++) {// i = 0 j = 1부터 시작이기때문에 제외                                           // i = 1 j = 1 -->1                                           // i = 2 j = 2 -->1,2                                           // i = 3 j = 3 -->1,2,3                                           // i = 4 j = 4 -->1,2,3,4                 System.out.print(" ");             }             for (int k = 9 ; k >= i*2+1; k--) {// 0*2+1 1 = 987654321                                                 // 1*2+1 3 =  9876543                                                // 2*2+1 5 =   98765                                                // 3*2+1 7 =    987                                                // 4*2+1 9 =     9                                                   System.out.print("*");             }             System.out.println();         } Colored by Color Scripter

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for (int i = 0; i < 5; i++) {         for (int j = 4; j > i; j--) { // i = 0 j = 4,3,2,1                                       // i = 1 j = 4,3,2                                       // i = 2 j = 4,3                                       // i = 3 j = 4                                       // i = 4 --> j는 4부터 시작하여 i보다 클때까지 - 시키는데 4는 j와 같으므로 제외             System.out.print(" ");         }         for (int k = 1; k <= i*2+1; k++) {//k는 1부터 시작             System.out.print("*"); //  i 가  0 -->0*2+1 1 1  =         1                                      // i 가 1 -->1*2+1  3 3 <=       1,2,3                                     // i 가 2 -->2*2+1  5 5 <=     1,2,3,4,5                                     // i 가 3 -->3*2+1  7 7 <=   1,2,3,4,5,6,7                                     // i 가 4 -->4*2+1  9 9 <= 1,2,3,4,5,6,7,8,9                                 }         System.out.println("---");     }              for (int i = 0; i < 4; i++) {//4줄만 필요하므로 i는 5가아니라 4보다 작아야한다             for (int j = 0; j <= i; j++) {// i = 0 j = 0 -->0                                           // i = 1 j = 1 -->0,1                                           // i = 2 j = 2 -->0,1,2                                           // i = 3 j = 3 -->0,1,2,3                  System.out.print(" ");             }             for (int k = 7 ; k >= i*2+1; k--) {// 0*2+1 1 = 7654321                                                 // 1*2+1 3 =  76543                                                // 2*2+1 5 =   765                                                // 3*2+1 7 =    7                   System.out.print("*");             }             System.out.println();         } Colored by Color Scripter

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