Question

After the following code runs, what is the value of isWeekend? var isSaturday = true; var isSunday = false; var isWeekend = isSaturday || isSunday; a. true b. false c. null d. undefined

Answer 1

The value of isWeekend will be true.

Step-by-step explanation:

After the code runs, the value of isWeekend will be true. The code initializes two boolean variables isSaturday and isSunday with the values true and false respectively. Then, the isWeekend variable is assigned the value of isSaturday || isSunday. In JavaScript, the || operator returns true if at least one of the operands is true. Since isSaturday is true, isWeekend will also evaluate to true.

If at least one of the operands is true, the logical OR operator returns true. Since isSaturday is true in this instance, the expression isSaturday || isSunday is true. As a result, isWeekend's value will hold true.

It is essential to keep in mind that the logical OR operator cuts off power. This indicates that the second operand, isSunday, is not even evaluated if the first operand, isSaturday, is true because the overall result has already been determined.