Hello,Divymital,

Please, help me with my homework. It should be written on C#

Thank you in advance,

Yuliya

IT 1050 – Programming Logic
Take Home Test 1

3 points per problem – 48 points

1.       Create an infinite while loop.  Use a Boolean variable called keepLooping that set to true in the loop’s termination condition.  Hint: Use CTRL+C or Debug -> Terminate All to end the program.

inti = 14;

BooleankeepLooping = true;

while (keepLooping) ;

            {

if (i<= 13) ;

keepLooping = false;

i++;

Console.WriteLine(i);

            }

 

 

 

2.       Write a while loop to prints 1 through6 in square brackets:

 

 [1] [2] [3] [4] [5] [6]

 

inti = 1, n = 6;

while (i<= n)

            {

Console.Write(" [" + i + "] ");

i++;

 

            }

 

Console.WriteLine();

Console.ReadLine();

        }

 

 

 

 

3.       Write a for loop that computes the sum of first n positive integers.  Set the variable n to 12.  Print “The sum of all integers from 0-12 is “ + sum

sum = 1 + 2 + 3 + … + n

4.       Write a for loop that prints 1through n, separated by commas. Example: for n = 9 print

 

1, 2, 3, 4, 5, 6, 7, 8, 9

 

5.       Write a while loop that prints all even numbers 0 through n, separated by commas. Example: for n = 20 print

 

0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20

 

6.       Write a while loop that prints all odd numbers 1 through n, separated by commas. Example: for n = 15 print

 

1, 3, 5, 7, 9, 11, 13, 15

 

7.       Given the following code, For n = 7 what is the output?

int n;

inti = 0; // initialize

do {

Console.Write("*");

i++; // update!

} while (i< n); // test!

Console.WriteLine();

 

 

How is it different from the while loop?

 

8.       Write a sentinel loop that adds all of the numbers input by the end user and outputs the sum.  End on a sentinel value input by the user as -1.  The prompt should indicate that the user should input -1 to end.

 

9.       Write an if-else statement that takes accepts a numeric input for month (example: 1-Jaunary) and outputs the month description.  For example, if the user inputs 4, it will output April.

 

10.   Re-write problem 9 using a switch statement.

 

11.   How do we combine multiple Boolean values?  Give 3 primary operators that we use when working with multiple Boolean values.

 

12.   Use nested for loops to print a matrix of asterisks with input values numColumns and numRows.  Example output for numColumns = 10 and numRow = 3:

**********
**********
**********

13.   What is an off-by-one error?  Create a loop demonstrating off by one – please describe what is happening.  Also show the corrected code.  Use < in the incorrect version and <= in the correct version of the loop.

 

14.   There is a method called Substring that we can use with a string to look at a portion of a string.  For example, the following code will print the letter a.

string input = "abcdef";

Console.WriteLine(input.Substring(0, 1));

 

Given the following input, create a loop that uses the Substring method to count the number of times the letter ‘z’ occurs in a string input by the user.

 

                asdfojiaqweb;ounqwrb;ounwqen;zzznbnaozonza

 

Hint: increment the 1^st argument in the Substring method call.  You must use the Substring method in a loop to get credit!

15.   Use a for loop to print the following to the console:

16.   Input a number from user and displays power of the number. Ask user’s to whether continue or not. If user presses ‘y’ or ‘Y’ then continue and again accept a number. If user presses any other characters or numbers then quit.

Attachments:

• 1513001642-1050-Test01 2.docx