Coding Floats
Let's see how this convention is used to record numbers that are very small (in sense of their absolute value, which is close to zero).
A physical constant called Planck's constant (and denoted as H) according to the textbooks, has the value of: 6.62607 x 10^-34.
If you would like to use it in a program, you should write it this way:
6.62607E-34
Note: the fact that you've chosen one of the possible forms of coding float values doesn't mean that Python will present it the same way.
Python may sometimes choose different notation than you.
For example, let's say you've decided to use the following float literal:
0.000000000000000000000001
When you run this literal through Python:
Print(0.00000000000000001)
This is the result:
1e-22
Python always chooses the more economical form of the number's presentation, and you should take this into consideration when creating literals.
Strings
Strings are used when you need to process text (like names of all kinds, addresses, novels, etc.), not numbers.
You already know a bit about them, e.g., that strings need quotes the way floats need points.
This is a very typical string: "I am a string."
However, there is a a catch. The catch is how to encode a quote inside a string which is already delimited by quotes.
Let's assume that we want to print a very simple message saying:
I like "Monty Python"
How do we do it without generating an error? There are two possible solutions.
The first is based on the concept we already know the escape character, which you should remember is played by the backslash. The backslash can escape quotes too. A quote preceded by a backslash changes its meaning - it's not a delimiter, but just a quote. This will work as intended:
print("I like \"Monty Python\ "")
Note: you don't need to do any escaping here.
