Capítulo 5 - Funções de usuário: Validação de dados

Summary

This video script focuses on the importance of modularization in programming, emphasizing the reusability of functions. It illustrates how to create a reusable function for validating integer inputs within a specified range. The process includes defining the function, setting parameters for the range, and handling user input with validation. Through an example, the script shows how to create the 'valid_integer' function, which ensures users provide valid data. It also highlights how the function can be reused in different scenarios and stresses the significance of modular code for improved program efficiency and flexibility.

Takeaways

• 😀 Modularization enables code reuse, reducing repetition and making it easier to maintain programs.
• 😀 Validating user input is a common task that can be modularized, such as validating data entries like numbers and letters.
• 😀 A function for validating integers within a specific range can be reused in different programs.
• 😀 The function `valid_integer` needs to check if a user's input is within the specified range and prompt for re-entry if it's invalid.
• 😀 The function `valid_integer` requires two parameters: the lower and upper bounds of the range.
• 😀 The function should return a valid value once it passes the validation checks.
• 😀 Using a `while` loop inside the `valid_integer` function ensures continuous validation until the user inputs a valid value.
• 😀 The return value of the `valid_integer` function should be stored in a variable to be used later in the program.
• 😀 The `start` function is responsible for calling `valid_integer` and displaying the valid input to the user.
• 😀 Parameters passed into a function should be used within the function, not relying on global variables.
• 😀 The program demonstrates how to validate input for multiple scenarios, such as validating values within different ranges, making the validation function reusable.

Q & A

What is the main advantage of modularization as mentioned in the script?

The main advantage of modularization is reusability. It allows for creating functions that can be reused in multiple programs whenever a repetitive task occurs.

What is the specific problem addressed by the function in the script?

The specific problem addressed is validating user input to ensure that it falls within a specified range of integers.

What does the function 'valido_inteiro' do?

The function 'valido_inteiro' validates whether an integer entered by the user falls within a specified range, asking for re-entry if the value is invalid.

What parameters does the function 'valido_inteiro' take?

The function 'valido_inteiro' takes two parameters: 'inferior' and 'superior', which represent the lower and upper bounds of the acceptable range for the input.

How does the function 'valido_inteiro' ensure the input is valid?

The function uses a 'while' loop that keeps asking the user for input until the value falls within the specified range, checking the validity with conditional statements.

What happens if the user enters an invalid value in 'valido_inteiro'?

If the user enters an invalid value, the function will print 'Valor inválido! Redigite.' and prompt the user to enter a valid number again.

What is the purpose of the 'inicio' function in the script?

The 'inicio' function calls 'valido_inteiro' twice with different ranges and prints the valid numbers entered by the user after each call.

Why is modularization important in the context of this script?

Modularization is important because it allows the 'valido_inteiro' function to be reused for different ranges without rewriting the same validation code, enhancing code efficiency and maintainability.

What type of loop is used in the function 'valido_inteiro' to repeatedly ask for input?

A 'while' loop is used in the 'valido_inteiro' function to repeatedly prompt the user for input until the entered value is valid.

What would happen if global variables were used instead of passing parameters in 'valido_inteiro'?

Using global variables instead of passing parameters would make the function less flexible and harder to reuse, as it would depend on the external state, reducing its modularity and reusability.