Final answer:
The question is about writing a program that reads positive integers until -1 is entered, then displays the smallest and largest values and counts of even and odd numbers, excluding the -1. A Python code snippet is provided that initializes variables, prompts for input, updates the variables, and displays the results after input ends.
Step-by-step explanation:
The subject of the question involves writing a program to read a sequence of positive integer inputs from a user until they enter -1, after which the program should display the smallest and largest inputs, as well as the count of odd and even values among the inputs, excluding the -1 termination value. Here is a step-by-step Python example that accomplishes this task:
- Initialize variables to hold the smallest and largest values, and counters for even and odd values.
- Continuously prompt the user to enter a number until they enter -1.
- Check if each entered number is smaller than the smallest or larger than the largest and update accordingly.
- Increment the even or odd counter based on the input's divisibility by 2.
- Once -1 is entered, display the results: smallest, largest, even count, and odd count.
Here's an example code snippet:
smallest = None
largest = None
even_count = 0
odd_count = 0
while True:
num = int(input("Enter a positive integer or -1 to stop: "))
if num == -1:
break
if smallest is None or num < smallest:
smallest = num
if largest is None or num > largest:
largest = num
if num % 2 == 0:
even_count += 1
else:
odd_count += 1
print("Smallest number:", smallest)
print("Largest number:", largest)
print("Number of even values:", even_count)
print("Number of odd values:", odd_count)
This program will correctly fulfill the requirements described in the question.