public class Main {
public static void main(String[] args) {
int a;
int b;
a = 20;
b =a+5;
System.out.println(a);
System.out.println(b);
}
}
Execution result
20
25
Something like the 6th line is called an expression. "A", "b" and "5" are called operands, and "+" and "*" are called operators. Even if it is a complicated formula, all the formulas consist of these two.
Among operants, what is described in the source code such as "5" and "hello, world" is called a literal. Literals have data types such as (int).
A special character is represented by a description method that is described by the \ symbol followed by a single character.
| Notation | meaning |
|---|---|
| ￥” | Double quote symbol |
| ¥ ’ | Quote symbol |
| ￥￥ | Yen sign |
| ￥ｎ | new line |
| operator | function |
|---|---|
| ＋ | addition |
| - | subtraction |
| ＊ | multiplication |
| ／ | division |
| ％ | Remainder of division (remainder) |
| ＋ | String concatenation |
| ＝ | Substitute the right side for the left side |
| ＋＝ | Add the left side and the right side and assign to the left side (as per the arithmetic operator) |
| ＋＋ | Increase the value by one |
| --- | Decrease the value by one |
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