Design a program that asks the user to enter a series of numbers. The user should enter -99 to signal the end of the series. After all the numbers have been entered, the program should display the largest and smallest numbers entered. Do not put the numbers in a list or use the Python supplied functions to find the minimum and maximum values in a list.

Before writing any code, analyze the problem. As described in the examples for Python Programming Tutorials, Lesson 4, identify the inputs to the program and outputs coming from the program. Describe the processing as a logical sequence of steps (i.e., an algorithm). Summarize the analysis in the form of an IPO chart and include the IPO chart as comments at the top of your source code (.py) file. IPO chart comments are illustrated in the examples for Lesson 4.

Here is an algorithm you can use:

Write "Enter a number (enter -999 to end)"

Get number

highest = number

lowest = number

While (number != -999)

 if (number > highest)

 highest = number

 if (number < lowest)

 lowest = number

 Write "Enter a number (enter -999 to end)"

 Get number

Write "The highest number is ", highest

Write "The lowest number is ", lowest

Convert this algorithm into a Python script inside of a def main(): module as shown in Lesson 4. Run the program in Pep 8 to make sure it produces the results you expected.

Turn in:

Source code (.py script) with IPO comments

Screen shot of testing