One Pager Cheat Sheet

• This lesson will discuss variables and assignment of data values in Python for storing data temporarily.
• Variables are placeholders for data values that can be assigned using the assignment operator (=) and re-assigned when needed.
• Python can create variables directly by providing a name and assigning it a value, as shown in the code blocks, and then use the print() or variable name to display the stored value.
• We need to be careful to follow the specific syntax rules when creating variables, or they may not be created correctly and cause errors.
• Creating a variable in Python is done by having a variable name followed by an assignment operator (=) and a value, as is the case with the code snippet words = "Hello World!", which is a valid way to declare the variable words.
• Yes, using an underscore (_) is a valid way to name variables in Python.
• Variables can be reassigned in Python, replacing their previous value with a newer one.
• We can perform different operations on each type of variable, such as mathematical operations on integers or concatenation of strings.
• The final value of a is "World".
• The program prints the result of concatenating the values in the first_name and last_name variables, which is AnnaGreen.
• Creating meaningful variable names is key to being able to keep track of values stored in a program.