public static void main(String[] args) {
// 整數變數宣告
System.out.println("負號運算:-7 = " + -7 );
System.out.println("乘法運算:5 * 6 = " + 5*6);
System.out.println("除法運算:7.0/2.0 = " +7.0/2.0);
System.out.println("餘數運算:7 % 2 = " + 7%2);
System.out.println("加法運算:4 + 3 = " + (4+3));
System.out.println("減法運算:4 - 3 = " + (4-3));
// 字串連接運算子
String str1 = "Java是";
String str2 = "一種物件導向程式語言";
System.out.println("字串連接: " + (str1 + str2));
int x, y, f, c; // 變數宣告
x = 6; y = 3;
f = x*x-2*x+3; // 數學公式
System.out.println("x*x-2*x+3 = " + f);
f = (x+y)*(x+y)+5;
System.out.println("(x+y)*(x+y)+5 = " + f);
c = 80;
System.out.print("攝氏: " + c + "度= 華氏: ");
System.out.println((9.0 * c) / 5.0 + 32.0);
}
}
=====Result====
負號運算:-7 = -7
乘法運算:5 * 6 = 30
除法運算:7.0/2.0 = 3.5
餘數運算:7 % 2 = 1
加法運算:4 + 3 = 7
減法運算:4 - 3 = 1
字串連接: Java是一種物件導向程式語言
x*x-2*x+3 = 27
(x+y)*(x+y)+5 = 86
攝氏: 80度= 華氏: 176.0
=======
