자바 구구단 3단씩 출력 - jaba gugudan 3danssig chullyeog

결과창

1*1=1    2*1=2    3*1=3

1*2=2         2*2=4         3*2=6

1*3=3         2*3=6        3*3=9

1*4=4         2*4=8         3*4=12

1*5=5         2*5=103*5=15

1*6=6        2*6=123*6=18

1*7=7         2*7=143*7=21

1*8=8         2*8=16 3*8=24

1*9=9        2*9=183*9=27

4*1=4    5*1=5         6*1=6

4*2=8         5*2=106*2=12

4*3=125*3=156*3=18

4*4=165*4=20 6*4=24

4*5=205*5=256*5=30

4*6=245*6=306*6=36

4*7=285*7=356*7=42

4*8=325*8=406*8=48

4*9=365*9=456*9=54

7*1=7         8*1=8         9*1=9

7*2=148*2=169*2=18

7*3=218*3=249*3=27

7*4=288*4=329*4=36

7*5=358*5=409*5=45

7*6=428*6=489*6=54

7*7=498*7=569*7=63

7*8=568*8=649*8=72

7*9=638*9=72 9*9=81

소스코드

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import java.util.Scanner;

public class Test21 {

public static void main(String[] arg) {

for (int i = 1; i < 10; i += 3) {

for (int j = 1; j < 10; j++) {

for (int k = i; k < i + 3; k++)

System.out.printf(k + "*" + j + "=" + k * j + "\t");

System.out.println();

}

System.out.println();

}

}

}

출처: 삼성SDS멀티캠퍼스 

강사: 홍승길

Email : 

1. 2단부터 9단까지 세로로 구구단 출력 

public static void main(String[] args) { for(int i=2; i<10; i++) { for(int j=1; j<10; j++) { System.out.println(i + "x" + j + "="+ (i*j)); } System.out.println(); } }

결과화면 :

더보기

2x1=2

2x2=4

2x3=6

2x4=8

2x5=10

2x6=12

2x7=14

2x8=16

2x9=18

3x1=3

3x2=6

3x3=9

3x4=12

3x5=15

3x6=18

3x7=21

3x8=24

3x9=27

4x1=4

4x2=8

4x3=12

4x4=16

4x5=20

4x6=24

4x7=28

4x8=32

4x9=36

5x1=5

5x2=10

5x3=15

5x4=20

5x5=25

5x6=30

5x7=35

5x8=40

5x9=45

6x1=6

6x2=12

6x3=18

6x4=24

6x5=30

6x6=36

6x7=42

6x8=48

6x9=54

7x1=7

7x2=14

7x3=21

7x4=28

7x5=35

7x6=42

7x7=49

7x8=56

7x9=63

8x1=8

8x2=16

8x3=24

8x4=32

8x5=40

8x6=48

8x7=56

8x8=64

8x9=72

9x1=9

9x2=18

9x3=27

9x4=36

9x5=45

9x6=54

9x7=63

9x8=72

9x9=81

2. 2단부터 9단까지 가로로 구구단 출력

public static void main(String[] args) { for(int i=1; i<10; i++) { for(int j=2; j<10; j++) { System.out.print(j + "x" + i + "="+ (i*j) + "\t"); } System.out.println(); } }

결과화면:

더보기

2x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=9

2x2=43x2=64x2=85x2=10 6x2=127x2=148x2=169x2=18

2x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=27

2x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=36

2x5=103x5=154x5=205x5=256x5=30 7x5=358x5=409x5=45

2x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=54

2x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=63

2x8=163x8=244x8=325x8=406x8=487x8=56 8x8=649x8=72

2x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81

3. 1단부터 9단까지 3행 3열로 구구단 출력

public static void main(String[] args) { for(int i=1; i<10; i+=3) { for(int j=1; j<10; j++) { for(int k=i; k<3+i; k++) { System.out.print(k + "x" + j + "=" + k*j + "\t"); } System.out.println(); } System.out.println(); } }

결과화면:

더보기

1x1=12x1=23x1=3

1x2=22x2=43x2=6

1x3=32x3=63x3=9

1x4=42x4=83x4=12

1x5=52x5=103x5=15

1x6=62x6=123x6=18

1x7=72x7=143x7=21

1x8=82x8=163x8=24

1x9=92x9=183x9=27

4x1=45x1=56x1=6

4x2=85x2=106x2=12

4x3=125x3=156x3=18

4x4=165x4=206x4=24

4x5=205x5=256x5=30

4x6=245x6=306x6=36

4x7=285x7=356x7=42

4x8=325x8=406x8=48

4x9=365x9=45 6x9=54

7x1=78x1=89x1=9

7x2=148x2=169x2=18

7x3=218x3=249x3=27

7x4=288x4=329x4=36

7x5=358x5=409x5=45

7x6=428x6=489x6=54

7x7=498x7=569x7=63

7x8=56 8x8=649x8=72

7x9=638x9=729x9=81