算術運算子

【典型程式碼】

1.除運算：/

int num1 = 12;
int num2 = 5;
int result = num1 / num2;
System.out.println(result);//2

2.取餘運算：%

int m1 = 12;
int n1 = 5;
System.out,println("m1 % n1 = " + m1 % n1);

int m2 = -12;
int n2 = 5;
System.out,println("m2 % n2 = " + m2 % n2);

int m3 = 12;
int n3 = -5;
System.out,println("m3 % n3 = " + m3 % n3);
 

int m4 = -12;
int n4 = -5;
System.out,println("m4 % n4 = " + m4 % n4);

3.（前）++：先自增1，後運算 |（後）++：先運算，後自增1

int a1 = 10；
int b1 = ++a1;
System.out.println("a1 = " + a1 + ",b1 = " + b1);

int a2 = 10；
int b2 = a2++;
System.out.println("a2 = " + a2 + ",b2 = " + b2);

int a3 = 10;
++a3;//a3++;
int b3 = a3;

4.（前）--：先自減1，後運算 |（後）--：先運算，後自減1

int a4 = 10;
int b4 = a4--;//int b4 = --a4;
System.out.println("a4 = " + a4 + ",b4 = " + b4);

【特別說明】

1.(前)++：先自增1，後運算 | (後)++：先運算，後自增1

2.(前)--：先自減1，後運算 | (後)--：先運算，後自減1

3.連線符：“+”，只在String與其他資料型別變數之間使用時，才表示是連線符。