The result type of the logical expression is bool, and the value can only be true or false.
- "!" is a unary operator, and the usage form is:! Operand. The function of non-operation is to negate the operand.
- "&&" is a binary operator. The function of "&&" operation is to find the logical AND of two operands
- "||" is also a binary operator. The function of "||" operation is to find the logical OR of two operands.