Code should be in Python, please   Prompt the user to enter a string of their choosing. Output the string.  Ex: Enter a sentence or phrase: The only thing we have to fear is fear itself. You entered: The only thing we have to fear is fear itself. Complete the get_num_of_characters() function, which returns the number of characters in the user's string. Use a for loop in this function. Extend the program by calling the get_num_of_characters() function and then output the returned result. Extend the program further by implementing the output_without_whitespace() function. output_without_whitespace() outputs the string's characters except for whitespace (spaces, tabs). Note: A tab is '\t'. Call the output_without_whitespace() function in main(). Ex: Enter a sentence or phrase: The only thing we have to fear is fear itself. You entered: The only thing we have to fear is fear itself. Number of characters: 46 String with no whitespace: Theonlythingwehavetofearisfearitself.

C++ coding

The following functions are all intended to check whether a string representing a dna sequence contains any characters that are not 'a','c','g','t', 'A', 'C', 'G', or 'T'. At least some of these functions are wrong. Which ones are correct? A) def valid_dna1(dna):     for c in dna:         if c in 'acgtACGT':             return True         else:             return False B) def valid_dna3(dna):     for c in dna:         flag = c in 'acgtACGT'     return flag C)   def valid_dna4(dna):     for c in dna:         if not c in 'acgtACGT':             return False     return True -------------------------------------------------------------------------------------------------------------------------------------------------------- valid_dna1 only valid_dna4 only None of them. valid_dna1, and valid_dna4 only

*Using C# in Microsoft Visual Studio* create an application that lets the user enter a nonnegative integer and then uses a loop to calculate the factorial of that number. Display the factorial in a label or a message box. If the input is nonnumeric your program SHOULD NOT CRASH but display a message “”non numeric input”. If the input is negative display the message “”negative numbers are invalid.

In C#

-all-occurrences-of-a-substring-in-a-string/.

Is it real or not? A variable's scope is limited to the for loop when it is specified in the initialization phrase.

LAB ASSIGNMENTS IMPORTANT: you should complete the PDP thinking process for each program. Turn in items: 1) book_list.py: you can adapt your Chapter 4 book_list.py Lab program. The program summarizes costs of a book list. It uses all of our standard mipo_ex features. In this version of the program you must use pylnputPlus functions to perform all the input validation and for the main() loop decision. Adjust your program to allow book prices to include $ and cents. Restrict individual book prices to $100 maxium. • Clearly document, with comments, your use of the pyip functions. This program summarizes a book liat. Enter the number of books that you need: Please enter a whole number: three Enter a number greater than 0: 3 Enter the name of book #1: The Mueller Report Enter cost of The Mueller Report, to the nearest dollar: Please enter a whole number: 18 Enter the name of book #2: Educated: A Memoir Enter cost of Educated: A Memoir, to the nearest dollar: Please enter a whole number: 24…

True or False When a variable is declared in the initialization expression of a for loop, the scope of the variable is limited to the loop.

An integer n is passed as argument to a function named convert0to5. This function returns an integer by replacing all 0's in the number by 5.  Note: Do not convert the number to string.