A logical expression is a statement that evaluates to either true or false. In this context, the first code segment, which includes the condition within the if statement, serves as a logical expression. The code if (total > 250) checks whether the variable total exceeds 250. If this condition evaluates to true, the code within the curly braces executes, indicating that a discount should be applied (by setting discount = true).
This segment is utilized for decision-making in programming, which is central to controlling the flow of execution based on certain conditions. The clarity of this logical expression allows programmers to programmatically determine whether specific actions, such as applying a discount, should occur based on the computed total.
The other segments do not contain logical expressions as they do not evaluate conditions that yield a boolean result. Instead, they involve actions or calculations without the functionality to evaluate a truth value.