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Tracer 1 - While Loops

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Instructions

PDF Instructions

For each question, complete the following:

1. Create the loop from the prompt or trace the loop provided.
2. Show your work tracing the variable(s). Assume the variables are named n, m, etc..
3. Answer the following questions:
   1. How many iterations are performed?
   2. What is/are the final value of the variable(s) when the loop terminates?
   3. What is the output, if any?

Example

1. Create a while loop that displays the numbers from 5 to 25 in increments of 4.

int n = 5;

while (n <= 25)
{
    Console.Write(n + ",");
    n = n + 4;
}

• n: 5, 9, 13, 17, 21, 25, 29
• Number of iterations: 6
• Final value of n: 29
• Output: 5,9,13,17,21,25

Questions

1. Create a while loop that displays the numbers from 1 to 10.
2. Create a while loop that displays the numbers from 27 down to 15.
3. Create a while loop that displays the numbers 1 to 30 in increments of 3.
4. Create a while loop that displays the numbers from 5 to 50 in increments of 5.
5. Trace the following loop:

int n = 10;

while (n <= 45)
{
    n = n * 2;
    n = n - 5;
    Console.WriteLine(n);
}

6. Trace the following loop:

int n = 1;

while (n < 100)
{
    n = n + 25;
    n = n - 10;

    if (n % 2 == 0)
    {
        Console.WriteLine(n);
    }
}