"""
Lecture 1-2: Programming Basics

Learning Goals:
 - Recognize and use the basic data types in programs
 - Interpret and react to basic error messages caused by programs
 - Use variables in code and trace the different values they hold
"""

print(4 + 3.5)
print("Hello" + "World")
print(7 < 20)

print("A", "B", "C", "D")

name = "Kelly"
print("My name is:", name)
name = "Stella"
print("My name is:", name)

x = 5
y = x - 2 # x evaluates to 5
x = x - 1 # x is 5 on the right, then changes to 4
print("x:", x) # x: 4