Pearson eText for Starting Out With Visual Basic -- Instant Access (Pearson+)
8th Edition
ISBN: 9780137506019
Author: Tony Gaddis, Kip Irvine
Publisher: PEARSON+
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Chapter 3, Problem 9TF
T F: If the CInt function cannot convert its argument, it causes a runtime error.
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Usernames
An online company needs your help to implement a program that verifies the username chosen by a new user. Their rules is described below:
Username MUST contain at least 6 characters;
Username cannot start with a number;
Username can only contain letters or numbers.
If valid, the username may be resgistered if it doesn't already exist in the system.
You should not use built-in functions to determine the character type such as isnumeric() or islower().
Use the strings given alphabet and numeric to determine if each character is valid.
Use the list registered to help you determine if the username is already registered.
Don't forget to execute the cell below to use these strings
# run this cell to create these variablesalphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'numeric = "0123456789"registered = ["john87", "topmage", "light4ever", "username2"]
Write a function nameValidation which receives a String argument name. This function:
has name String…
Usernames
An online company needs your help to implement a program that verifies the username chosen by a new user. Their rules is described below:
Username MUST contain at least 6 characters;
Username cannot start with a number;
Username can only contain letters or numbers.
If valid, the username may be resgistered if it doesn't already exist in the system.
You should not use built-in functions to determine the character type such as isnumeric() or islower().
Use the strings given alphabet and numeric to determine if each character is valid.
Use the list registered to help you determine if the username is already registered.
Don't forget to execute the cell below to use these strings
# run this cell to create these variablesalphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'numeric = "0123456789"registered = ["john87", "topmage", "light4ever", "username2"]
Write a function registerName which receives a String username and it returns a string message. This…
Usernames
An online company needs your help to implement a program that verifies the username chosen by a new user. Their rules is described below:
Username MUST contain at least 6 characters;
Username cannot start with a number;
Username can only contain letters or numbers.
If valid, the username may be resgistered if it doesn't already exist in the system.
You should not use built-in functions to determine the character type such as isnumeric() or islower().
Use the strings given alphabet and numeric to determine if each character is valid.
Use the list registered to help you determine if the username is already registered.
Don't forget to execute the cell below to use these strings
# run this cell to create these variablesalphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'numeric = "0123456789"registered = ["john87", "topmage", "light4ever", "username2"]
Chapter 3 Solutions
Pearson eText for Starting Out With Visual Basic -- Instant Access (Pearson+)
Ch. 3.1 - What TextBox control property holds text entered...Ch. 3.1 - Prob. 3.2CPCh. 3.1 - Prob. 3.3CPCh. 3.1 - Prob. 3.4CPCh. 3.2 - Prob. 3.5CPCh. 3.2 - Write a variable declaration for an Integer...Ch. 3.2 - Which of the following variable names are written...Ch. 3.2 - Prob. 3.8CPCh. 3.2 - What default value is assigned to each of the...Ch. 3.2 - Write a Date literal for the following date and...
Ch. 3.2 - Prob. 3.11CPCh. 3.3 - Prob. 3.12CPCh. 3.3 - Prob. 3.13CPCh. 3.3 - Prob. 3.14CPCh. 3.3 - What will be the final value of dblResult in the...Ch. 3.3 - What will be the final value of dblResult in the...Ch. 3.4 - Prob. 3.17CPCh. 3.4 - Prob. 3.18CPCh. 3.4 - Prob. 3.19CPCh. 3.4 - Will the following statement execute or cause a...Ch. 3.4 - Prob. 3.21CPCh. 3.4 - Assuming that intNumber is an integer variable,...Ch. 3.4 - Prob. 3.23CPCh. 3.4 - How would the following strings be converted by...Ch. 3.5 - Prob. 3.25CPCh. 3.5 - For each of the following numeric formats,...Ch. 3.5 - Prob. 3.27CPCh. 3.5 - In the following table, fill in the expected...Ch. 3.5 - Prob. 3.29CPCh. 3.5 - Prob. 3.30CPCh. 3.6 - Prob. 3.31CPCh. 3.6 - Where do you declare class-level variables?Ch. 3.7 - Prob. 3.33CPCh. 3.7 - Prob. 3.34CPCh. 3.7 - What kind of code does the try block of a...Ch. 3.7 - Prob. 3.36CPCh. 3.7 - Prob. 3.37CPCh. 3.7 - Prob. 3.38CPCh. 3.8 - Prob. 3.39CPCh. 3.8 - Prob. 3.40CPCh. 3.8 - Prob. 3.41CPCh. 3.8 - 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