Why does a scanner need to "look" at the next characters sometimes?
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Why does a scanner need to "look" at the next characters sometimes?
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- Part 6: Boolean Logic Expressions Boolean expressions are types of logical operations that we can perform on true and false values. Note that the word Boolean is always capitalized because it was named after its inventor, George Boole. Boolean algebra is a very important topic in computer science, and if you haven't learned it before you definitely will in the future. However, for our purposes we are only interested in how we can use them to manipulate binary numbers. The way we use them on binary numbers is by treating 1 as true and 0 as false. From this point on I will be using 0 and 1 instead of false and true. There are many types of Boolean expressions, but the three most important ones are AND, OR, and NOT. AND takes 2 operands and will output 1 if they are both 1, or 0 otherwise OR takes 2 operands and will output 1 if either one is 1, or 0 if neither is 1 NOT takes 1 operand and reverses it: 1 becomes 0, and 0 becomes 1 We can represent this behavior using something called a…Using codes snippets briefly explain how the Scanner class can be used to accept data from the keyboard in Java programming.The blank should be completed as necessary.With Leibniz's gadget, addition, subtraction, multiplication, and division are all possible.
- Read carefully please!Barcode Validation As you are aware, barcodes encode numbers. In the Universal Product Code system, each item is assigned a globally unique number. But not every number is a valid UPC. Why? Part of the answer is the check digit. In order to catch errors, the rightmost digit is calculated from the others. If this digit does not match its expected value, you can be assured the barcode is invalid, or has been read incorrectly. To calculate the check digit, perform the following operations modulo 10: • Sum the digits in the odd positions and multiply the result by three. • Add the digits in the even positions to the result. • Subtract the result from 10 to obtain the check digit. Your Task Given a 12-digit UPC, you will need to identify whether is is valid or invalid. The code will be provided from standard input. You simply need to print "valid" or "invalid" in response. Notes The code will be provided on a line by itself, and will consist of numerals alone. You may assume that it will be…What does it mean, precisely, to choose numbers at random?
- explain and prove the algorithm You found a lost civilizations' library and you are interested in its alphabet of 7 strange characters. Each book has a title in this alphabet and you hope that the books are arranged in lexicographical order on the bookshelves. You would like to know whether the order of the books uniquely determines the order of the characters of the alphabet, or if there is insufficient information, or whether even such an order cannot exists (meaning that someone must have shuffled the books). Think of the input as a list of words without spaces from the alphabet "a-z", and the question is the order of the characters "a-z" in the examined alphabet. Try to find an algorithm which solves this problem in time linear in the size of the input (that is, the number of characters on input). You may assume that each character appears at least once. Don't assume that the size of the alphabet is a fixed constant (like 26); treat it as a variable n, and let L be the total number…Every time refactoring is done, one must runWhen multiplying two arrays in Matlab using the rules of linear algebra the number of columns in the first array must equal the number of rows in the second array the number of rows in the first array must equal the number of columns in the second array you need a period in front of the multiplication sign the arrays must have the exact same size and shape When combining two arrays in Matlab using the command A*B both arrays must be square the arrays must have the exact same size and shape the result is usually not the same as B*A all of the above When multiplying two vectors using the command A*B if A is a row vector then B must be a column vector A and B must both be row vectors A and B must both be column vectors please help with these multiple choice question
- Without duplicating: give an example of code with two modifiers? Note: Please include your work cited from CPT2021 Professional Edition2. Characters in Strings A large part of the text processing done by computers involves reading user input and figuring out what it means. We'll do something like that today: given a string supplied by a user, we report (1) the total length of the string, (2) how many alphabetic characters, (3) how many numeric characters, (4) how many vowels (a, e, i, o, u) were in that string, and (5) how many of the alphabetics were upper-case. For example, if a user input this line: the program would say: String length: 30 James Bond, 007, works for MI6 Alphabetics: 19, upper-case: 4 Numerics: 4 Vowels: 6 You will need to use a new (to us) function to read the user input. You have been using cin but this won't work for your needs in this program. Instead, use getline (cin,s) where s is a string variable. That string will contain everything the user typed up to but not including the Enter the user typed to end the line. So you have a string but you'll need a loop to check for each individual…الفصل: الثاني الموضوع : واجب منزلي Assignment Question: (i): Given three numbers (numl, num2, and num3), write an algorithm to find and print the sum
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