PROJECT 2 - TEMP CONVERTER

LAB 3 - Formatting Numbers

Lab 3 Overview

Now that we know how to work with numbers, including performing mathematical operations, let's learn how to format them better for display.

TASK 1

Open lab3.py from Project 2 - Temp Converter

Rounding Numbers

One of the most common things you will need to do is round a number to a fixed amount of decimal places.
For this, we can use the round() function. Notice how you can specify the number of decimal places, or just round to an integer.

Formatting Large Numbers

You may have a large number which would be more readable with commas as thousands separators.
Here we just use an f-string as normal, but after the variable place a colon and comma. Like this :,

Scientific Notation

You may have a very large or very small number which would be better presented with scientific notation.
Here we just use an f-string as normal, but after the variable place a colon, the number of significant figures and then 'e'. Like this :.2e

More Formatting

This is just the tip of the iceberg. There is a lot you can do with f-strings to format numbers (and other data types).
Here are just a couple of more examples before you attempt the lab.

TASK 2

Complete the following requirements:
- Ask the user for a decimal number and store it in a variable 'num1', converting to a float
- Round the number to 2 decimal places using the round function
- Define a large integer
- Print the large integer with commas as thousands separators using f-strings
- Define a small floating-point number
- Print the number in scientific notation using f-strings
- Define a small integer
- Print the number with leading zeros using f-strings
Press Ctrl + F5 to run the program or open a terminal and type python lab3.py
It should run without errors and you should see something like on the right:

Example:

Please enter a decimal number: 7.4398

Rounded to 2 decimal places: 7.44

Large Number: 1,234,567,890

Small Number: 1.23e-04

Leading Zeros: 00042

You should now know how to format numbers in a variety of ways in Python.
Let's wrap up this lab by pushing our code to GitHub:

TASK 3

Enter a commit message. E.g. "Lab 3 complete"
Press Commit to main
Press Push origin

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