JAVA概述（8） 循环语句（流程控制）(代码实践2)

注：X的值会随着循环体内的递增而变化值

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public class ExerciseThree {
public static void main(String[] args) {
/*

* 顺着打*
**
***
****
*****
******
*******
外循环控制排
内循环控制列
外循环循环7次
迭代--
用外循环控制内循环的列数j=i
*/
for (int i = 8; i >1; i--)

{

for (int j = i; j < 9; j++) {
System.out.print("*");
}
System.out.print("\n");
}

for (int i = 0; i < 7; i++)

{
for (int j = 0; j <=i; j++) {
System.out.print("*");
}
System.out.print("\n");
}


/*
* 倒着打
*/

for (int i = 1; i < 7; i++)

{

for (int j = i; j < 7; j++) {
System.out.print("*");
}
System.out.print("\n");
}

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

{

for (int j = i; j < 10; j++) {
int a = i *j ;
System.out.print(i + "*" + j + "=" + a +"\t");
}
System.out.println();
}
}
}

// String result = "";
//
// for(int i =0;i < 6; i++){
// int inVal = (int)(Math.random()*26+97);
// result = result + (char)inVal;
// }
// System.out.println(result); 随机生出字母串