Little Turtle Python Video third lecture (class notes)

1. Variables

In other programming languages, when a variable is assigned a value to a name, the value is stored in memory, and the name is called a variable.

In Python, it's a bit different, it's more like putting a name on top of a value, so you can say that Python has no variables.

34= a + bprint (c)

2. Places to note when using variables:

You need to assign a value to the its first before using the variable.
Variable names can include letters, numbers, and underscores, but variable names cannot begin with a number.
Letters can be uppercase or lowercase, but case is different.
The equal sign (=) is the meaning of the assignment, the left is the name, the right is the value, not the reverse.

3. Use of backslashes

You can insert a single quotation mark in your code

' let\ ' s go '

There are multiple backslashes for a string to do so

str = r'c:\\w\e\r\t\y'

You can also define the backslash itself

' c:\\d '

For a string that spans multiple lines:

" " I'm Me or me, or me? "print (str)

Little Turtle Python Video third lecture (class notes)