劉任昌w3schools,Java,迴圈,For Loop,整數int,字串String,美國資訊交換標準碼ascii,萬國碼unicode

w3schools截圖

Java for loop迴圈程式碼

//劉任昌,2022/10/20,Java迴圈for loop
public class Main {
  public static void main(String[] args) {
    int i, j;                   /*宣告整數integer變數i*/
    String a="第", b="列: ";    /*宣告字串a,b且給初始值*/
    System.out.println("劉任昌,2022/10/20,Java迴圈for loop");
    for (i = 9 ; i > 0; i--) {  /*迴圈,i控制*/
       System.out.print(a+i+b); /*系統的輸出的列印完換列println*/
       for (j = 0; j <= i ; j++)/*j 控制欄方向*/
          System.out.print(j);  /*迴圈內僅一指令,可省略{...}*/
       System.out.println('.'); /*println=print line*/  
    }  
  }
}

w3schools學習Java,Character.toStringunicode統一碼

Character.toString將數字轉成萬國碼unicode統一碼

//劉任昌,2022/10/20,Java迴圈for loop
public class Main {
  public static void main(String[] args) {/*curly捲bracket*/
    int i, j;                   /*宣告整數integer變數i*/
    String a="第", b="列: ";    /*宣告字串a,b且給初始值*/
    System.out.println("劉任昌,2022/10/20,Java迴圈for loop");
    for (i = 9 ; i > 0; i--) {  /*迴圈,i控制*/
       System.out.print(a+i+b); /*系統的輸出的列印完換列println*/
       for (j = 0; j <= i ; j++)/*j 控制欄方向*/
          System.out.print(j);  /*迴圈內僅一指令,可省略{...}*/
       System.out.println('.'); /*println=print line*/  
    }
    for (i = 40845; i < 40860; i++){
       a = Character.toString(i); /*字元的.方法toString轉成字串*/
       b = " 字碼的字元: ";
       System.out.println(i + b + a);
    }
  }
}