What Is The Output For The Following Program?$ \begin{array}{l} \text{numB} = 2 \ \text{while NumB} \ \textless \ 15 \ \ \ \ \text{numB = \text{numB} + 5 \ \ \ \ \text{print(numB)} \end{array} }$Output: $\square$

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Introduction

In this article, we will be discussing a simple Python program that uses a while loop to print numbers from 2 to 14 with a step of 5. The program is designed to demonstrate the basic syntax and functionality of a while loop in Python. We will analyze the code, understand its logic, and determine the output of the program.

Understanding the Code

The given program is as follows:

numB = 2
while numB < 15:
    numB = numB + 5
    print(numB)

Let's break down the code and understand what each line does:

  • numB = 2: This line initializes a variable numB and assigns it the value 2.
  • while numB < 15:: This line starts a while loop that continues to execute as long as the condition numB < 15 is true.
  • numB = numB + 5: This line increments the value of numB by 5 in each iteration of the loop.
  • print(numB): This line prints the current value of numB in each iteration of the loop.

Analyzing the Loop

Now, let's analyze the while loop and determine how many iterations it will perform. The loop starts with numB = 2 and continues as long as numB < 15. In each iteration, numB is incremented by 5.

Here's a step-by-step breakdown of the loop:

  1. numB = 2 (initial value)
  2. numB = 2 + 5 = 7 (first iteration)
  3. numB = 7 + 5 = 12 (second iteration)
  4. numB = 12 + 5 = 17 (third iteration)

However, the loop will terminate when numB reaches 15, which is the condition specified in the while loop. Therefore, the loop will only perform two iterations.

Determining the Output

Now that we have analyzed the loop, let's determine the output of the program. In the first iteration, numB is printed as 7. In the second iteration, numB is printed as 12.

Therefore, the output of the program will be:

7
12

Conclusion

In this article, we analyzed a simple Python program that uses a while loop to print numbers from 2 to 14 with a step of 5. We broke down the code, understood its logic, and determined the output of the program. The output of the program is 7 and 12, which are the values of numB in the first and second iterations of the loop, respectively.

Frequently Asked Questions

Q: What is the purpose of the while loop in the given program?

A: The while loop is used to print numbers from 2 to 14 with a step of 5.

Q: How many iterations will the while loop perform?

A: The while loop will perform two iterations.

Q: What is the output of the program?

Q&A: Frequently Asked Questions

Q: What is the purpose of the while loop in the given program?

A: The while loop is used to print numbers from 2 to 14 with a step of 5. The loop starts with numB = 2 and continues to increment numB by 5 in each iteration until it reaches 15.

Q: How many iterations will the while loop perform?

A: The while loop will perform two iterations. In the first iteration, numB is printed as 7. In the second iteration, numB is printed as 12.

Q: What is the output of the program?

A: The output of the program is 7 and 12, which are the values of numB in the first and second iterations of the loop, respectively.

Q: Why does the loop terminate after two iterations?

A: The loop terminates after two iterations because the condition numB < 15 is no longer true after the second iteration. In the third iteration, numB would be incremented to 17, which is greater than 15.

Q: Can I modify the program to print numbers from 2 to 20 with a step of 5?

A: Yes, you can modify the program to print numbers from 2 to 20 with a step of 5 by changing the condition in the while loop to numB < 21. This will ensure that the loop continues to iterate until numB reaches 20.

Q: How can I improve the program to make it more efficient?

A: You can improve the program by using a for loop instead of a while loop. A for loop is more efficient and easier to read than a while loop. Here's an example of how you can modify the program to use a for loop:

for numB in range(2, 21, 5):
    print(numB)

This will produce the same output as the original program, but it is more efficient and easier to read.

Q: What is the time complexity of the program?

A: The time complexity of the program is O(n), where n is the number of iterations. In this case, n is 2, so the time complexity is O(2). However, in general, the time complexity of a while loop is O(n), where n is the number of iterations.

Q: Can I use the program to print numbers from 2 to 100 with a step of 5?

A: Yes, you can use the program to print numbers from 2 to 100 with a step of 5 by changing the condition in the while loop to numB < 101. This will ensure that the loop continues to iterate until numB reaches 100.

Conclusion

In this article, we answered some frequently asked questions about the given program. We discussed the purpose of the while loop, the number of iterations, the output, and how to modify the program to make it more efficient. We also discussed the time complexity of the program and how to use it to print numbers from 2 to 100 with a step of 5.