Variables, Data Types, Expressions, Operators

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2. Variables, expressions and statements

Learn to Program (0:00 - 19:20)

A variable is a name for a location in memory.
Use a comma between a string literal and a string variable in print statements.
variable = input(prompt)
= is the assignment operator.
Many other languages require a variable be declared before being used.
Initialization is declaration and assignment at the same time.
In all languages, variables should be descriptive singular nouns.
In Python, the convention is to name variables in all lowercase with words separated by underscores. This is called snake_case.
Put comments in code to describe what code does.
Put a space before and after operators.

The input function returns a string.
To do math, strings must be converted to numbers using int or float like variable = int(input(prompt))

# Prof. Vanselow

# An integration of everything I have learned about programming

print("Welcome to my Integration Project!")

print("1. Calculate Area")

# side is a variable

# a variable is a name for a location in memory

side = int(input("Enter the length of the side of a square to get the area:"))

area = side * side

print(area)

# You could also do print(side * side)

print("Exiting.")