<span style="font-size:18px;">等腰三角形:
Scanner input = new Scanner(System.in);
int row=0;
System.out.print("请输入直角三角形的行数：");
int row = input.nextInt();
for (int i = 1; i <= row; i++) {
for (int k = 1; k <= row - i; k++) {
System.out.print(" ");
}
for (int j = 1; j <= 2 * i - 1; j++) {
System.out.print("*");
}
System.out.print("\n")
</span>
<span style="font-size:18px;"></span>
<span style="font-size:18px;"> 12345直角三角形:
Scanner input = new Scanner(System.in);
int rows = 0;
System.out.println("请输入行数:");
rows = input.nextInt();
for (int i = 1; i <=rows; i++) {
for (int k = 1; k<=i; k++) {
System.out.print(k);
}
System.out.print("\n");
}</span>
<span style="font-size:18px;">
九九乘法表:
</span>
<span style="font-size:18px;"> Scanner input =new Scanner(System.in);
int row=9;
for(int i=1;i<=row;i++){
for(int k=1;k<=i;k++){
System.out.print(k+"*"+i+"="+k*i+" ");
}System.out.print("\n");
}</span>
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