Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
6th Edition
ISBN: 9780134477367
Author: David J. Barnes, Michael Kolling
Publisher: PEARSON
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Chapter 1, Problem 31E

What are the types of the following values?

0 "hello" 101 1 true "33" 3 .1415

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Write an application that will take - 5 digit integer from user and calculate the sum of all digits of the integer. The application signature is as follows:- for integer 34567 prints 25.
you are working as a freelancer. A company approached you and asked to create an algorithm for username validation. The company said that the username is string S.You have to determine of the username is valid according to the following rules. 1.The length of the username should be between 4 and 25 character (inclusive). 2.Valid username must start with a letter. 3 Valid username can only contain letters, numbers, and underscores characters. 4 Valid username cannot ends with the underscore character and also doesn't accept the special characters. INPUT: The first line contains an integer T representing the number of test cases. The first line of each test cases input contains a string. OUTPUT: Each test case gives a Boolean value as output(true or false) sample Input: google Google_123 google@123 sampleOutput true true false sample input 2 HelloPython #Coder Coderlt sampleoutput 2 true false true

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