30天代码day2 Operators

Operators
These allow you to perform certain operations on your data. There are 3 basic types:

1. Unary: operates on 1 operand
2. Binary: operates on 2 operands
3. Ternary: operates on 3 operands

Arithmetic Operators
The binary operators used for arithmetic are as follows:

• +: Additive
• -: Subtraction
• *: Multiplication
• /: Division
• %: Remainder (modulo)

Additional Operators

• +: A binary operator used for String concatenation
• ++: This unary operator is used to preincrement 前自增(increment by 1 before use) when prepended to a variable name or postincrement 后自增(increment by 1 after use) when appended to a variable.
• --: This unary operator is used to predecrement 前自减(decrement by 1 before use) when prepended to a variable name or postdecrement 后自减(decrement by 1 after use) when appended to a variable.
• !: This unary operator means not (negation). It's used before a variable or logical expression that evaluates to true or false.
• ==: This binary operator is used to check the equality of 2 primitives.
• !=: This binary operator is used to check the inequality of 2 primitives.
• <, >, <=, >=: These are the respective binary operators for less than, greater than, less than or equal to, and greater than or equal to, and are used to compare two operands.
• &&, ||: These are the respective binary operators used to perform logical AND and logical OR operations on two boolean (i.e.: true or false) statements.
• ? : This ternary operator is used for simple conditional statements (i.e.: if ? then : else).