Assignment

• Used to store values for later use

a = 4
name = input("What is your name")

Converting to Integers

• int can be used to convert values into integers

>>> "42"
'42'
>>> int("42")
42

type

• type can be used check the type of a value

>>> type("Hello")
<class 'str'>
>>> type(1)
<class 'int'>

Storing converted values

• int does not modify value in place
• Results must be stored or used

answer = "42"
int(answer) # Has no meaningful side effects
answer_num = int(answer) # Stores answer as int

Getting Help

• Reach out if you need help on a lab
• Other students can be a great source of help
• Learn to know when you are using other resources as a crutch

Control Flow

• By default, the Python interpreter runs the next instruction in our program
• In order to create more complex programs, it is helpful to choose which instruction runs next
• This is modification of the control plane of program execution

if statement

• Conditionally runs a block of code
• A Boolean expression (the condition) follows the if statement
• The if statement is terminated by a :

if i == 0:

Example

if x > 0:
    print('x is positive')

Compound Statements

• Statements may be grouped together into blocks
• Blocks of statements should be indented using 4 spaces

Example

if False == True:
    print("This will not print")
    print("This will also not print")

print("This will print")

Integer division

• // performs integer division
• % is the modulo operator and computes the remainder after division

Division Example

>>> 11 / 4
2.75
>>> 11 // 4
2

Modulo Example

>>> 11 % 4
3
>>> 12 % 4
0
>>> 0 % 4
0
>>> 3 % 2
1

Why would we want a modulo operation?

Even or Odd

number = int(input("Enter a number:"))

if number % 2 == 0:
    print("Your number is even")

if number % 2 == 1:
    print("Your number is odd")