Chapter 4: Problem 22

Describe the steps that are generally taken when an input validation loop is used to validate data.

Short Answer

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Question: Describe the steps involved in creating an input validation loop. Answer: To create an input validation loop, follow these steps: 1. Understand the problem and identify the criteria for valid input. 2. Initialize any necessary variables. 3. Create a loop for getting user input and checking its validation using a "while" or "do-while" loop. 4. Check the validation of user input using conditional statements (if/else) inside the loop. 5. Provide feedback to the user if their input doesn't meet the required criteria and prompt for input again. 6. Once the user provides valid input and the loop ends, proceed with the program using the valid input.

Step by step solution

Understand the problem and identify the criteria for valid input

To create an input validation loop, first, understand the problem or the requirements of the program. Identify the criteria for the valid input, which will be used to check the user's input.

Initialize any necessary variables

Before starting the loop, initialize any necessary variables, such as a boolean variable to control the loop or variables to store user input.

Create a loop for getting user input and checking its validation

Use a "while" or "do-while" loop to ensure the user provides input until the input meets the required criteria. In the loop, prompt the user for input and store the input in a variable.

Check the validation of user input

Inside the loop, use conditional statements (if/else) to validate user input against the required criteria. If the input is valid, update the boolean variable used to control the loop, so the loop ends and the program continues with the valid input.

Provide feedback to the user

If the user's input does not meet the criteria, inform the user about the invalid input and any necessary instructions on how to provide valid input. The loop will continue, and the user will be prompted for input again until they provide valid input.

Proceed with the program using the valid input

Once the user provides valid input, and the loop ends, continue with the rest of the program using the valid input.

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Describe the steps that are generally taken when an input validation loop is used to validate data.

Short Answer

Step by step solution

Understand the problem and identify the criteria for valid input

Initialize any necessary variables

Create a loop for getting user input and checking its validation

Check the validation of user input

Provide feedback to the user

Proceed with the program using the valid input

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