java編寫乘法口訣表

1. JAVA 乘法口訣表

//反這來輸出

public static void main(String[] args) {
for(int i=9;i>0;i--) {
for (int j = 1; j <= i; j++) { //j<=i是確保列小於或等於行數
System.out.print(i + "x" + j + "=" + i * j+' '); //' '的意思是強制水平製表版
}
System.out.println(); //這一行權的意思循環結束就換行
}
}

2. 用while循環語句編程輸出九九乘法口訣表

方法一：

1 i = 1

2 while i < 10:

3 k = 1

4 while k <= i:

5 print('%d*%d=%2d '% (i,k,i*k),end='') #end=『』 表示不換行（系統默認輸出完畢換行）

6 k += 1

7 print()

8 i += 1

輸出結果

9 1*1= 1

10 2*1= 2 2*2= 4

11 3*1= 3 3*2= 6 3*3= 9

12 4*1= 4 4*2= 8 4*3=12 4*4=16

13 5*1= 5 5*2=10 5*3=15 5*4=20 5*5=25

14 6*1= 6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36

157*1= 7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49

16 8*1= 8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64

17 9*1= 9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

方法二、

1 a = 9

2 while a > 0:

3 i = 1

4 while i <= a:

5 print('%d * %d = %2d '%(a,i,a*i),end= '')

6 i += 1

7 print()

8 a -= 110 11

輸出結果：

9 9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81

10 9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81

11 8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64

12 7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49

13 6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36

14 5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25

15 4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16

16 3 * 1 = 3 3 * 2 = 6 3 * 3 = 9

17 2 * 1 = 2 2 * 2 = 4

18 1 * 1 = 1

3. Java 編輯乘法口訣表，求解

public class Great {
public static void main(String[]args) {
for(int x = 1 ; x <= 9 ; x++) {
for(int y = 1 ; y <= x ; y++) {
System.out.print(y + "*" + x + "=" + (y * x) + "\t") ;
}
System.out.println() ;
}
}
}