Chapter 4: Problem 27

Write a C++ statement that prints the message "The number is not valid." if the variable hours is outside the range 0 through 80.

Short Answer

Expert verified

Question: Write a C++ statement that checks if the variable "hours" is within the range 0 through 80, and if it's not, prints a message "The number is not valid." Answer: ```cpp if ( hours < 0 || hours > 80) { std::cout << "The number is not valid." << std::endl; } ```

Step by step solution

Initialize variable "hours" with some value

First, you need to declare and initialize an integer variable "hours" to some value, which will be later checked if it is within the valid range. Here is an example of how you can do it: ```cpp int hours = 50; // This value can be any number that represents the number of hours. ```

Use if statement and comparison operators to check the range

Next, you need to implement an if statement to check if the "hours" variable is outside the range 0 through 80. To do that, you can use comparison operators such as "greater than" (>) or "less than" (<) and logical operator "OR" (||). Here's how you can check if "hours" is outside the valid range: ```cpp if ( hours < 0 || hours > 80) { ```

Print the message if "hours" is outside the valid range

Since the conditions in Step 2 check if "hours" is outside the valid range, you can now print a message "The number is not valid." within this if statement: ```cpp std::cout << "The number is not valid." << std::endl; ``` To complete the if statement, you must close the braces: ```cpp } ```

Final code

Combining all the steps, the final C++ code should look like this: ```cpp #include int main() { int hours = 50; // This value can be any number that represents the number of hours. // Check if hours is outside the range 0 through 80 if ( hours < 0 || hours > 80) { std::cout << "The number is not valid." << std::endl; } return 0; } ```

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Computer Science Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Write a C++ statement that prints the message "The number is not valid." if the variable hours is outside the range 0 through 80.

Short Answer

Step by step solution

Initialize variable "hours" with some value

Use if statement and comparison operators to check the range

Print the message if "hours" is outside the valid range

Final code

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Computer Science Textbooks

Data Structures

Problem Solving Techniques

Functional Programming

Computer Systems

Computer Programming

Issues in Computer Science

Study anywhere. Anytime. Across all devices.