CS9

🔀 Conditionals

November 30, 2016

Learning Targets

Do Now (in Classroom)

What data type is required for a conditional?

Hint: The answer does not depend on the programming language– it will be the same type of data in Python, SNAP, JavaScript, etc…

Conditionals

if #something true
    # run this indented code
else:
    #run this indented code

Quick check

# What's the difference between
school = "F&T"
#and
223 == 223
# what about...
223 = "F&T"

Python Comparison Operators

Operator Description Example
== equal to x == 2
! not equal to y != 3
> greater than 4 > 3
< less than 1 < 1
>= greater than or equal to x >= 2
<= less than or equal to y <= 3 
"""
What will print after each conditional is run?
"""
# Number 1:
if 5<2:
    print("I am right")
else:
    print("I am wrong")

    # Number 2:
if 5>2:
    print("I am right")
else:
    print("I am wrong")

if even…

How can we tell if a number is even or odd?

%

This is not the percentage sign. I mean, it is, but in Python, it means modulo or mod. What?

It divides one number by another and returns the remainder. Like this:

print(4 % 3)
print(1040934 % 2)
print(1040934 % 2)

Before you start calculating, what are the only possibilities of each modulo operation?

Grouping

Finish "String Methods" (or submit in repl):

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