Shortcut operators are used to simplify which type of expressions?

Shortcut operators, also known as compound assignment operators, are specifically designed to simplify two-argument operator expressions. These expressions generally involve a variable and a second operand, allowing for concise notation that combines the operation with an assignment. For example, instead of writing x = x + 1, a programmer can use the shortcut operator as x += 1. This not only reduces the amount of code but also enhances readability and reduces the chance of errors in the operation.

In contrast, unary expressions typically involve a single operand, and conditional or logical expressions do not specifically benefit from the syntactic simplification that shortcut operators provide. While conditional expressions evaluate conditions and logical expressions involve logical operations, it's the two-argument operator expressions where shortcut operators truly excel in streamlining the coding process.