 Announcements Welcome party HW1 due, HW2 and partners posted Questions Practice: function to convert miles to kilometers 1.61 km per mile Problem: what icon to display in weather app? Simplified problem: difference between current and “hot” temperature (i.e., should the app show the current temperature in red) Decision time we can do this with Python’s if anatomy of if if : need to make program behavior conditional on state of the world diagram possible states and actions let’s say text has more than two settings (yellow, orange, red) if/elif/else nice way to structure this decision Practice: number guessing game given a player’s guess and a secret number, print “cold” “warm” or “lava” only print one hint boolean expressions relational operators less than (<), less than or equal to (<=) greater than (>), greater than or equal to (>=) equal (==) not equal (!=) can use and, or to combine expressions check if variable x is positive number at most 10: x > 0 and x <= 10 can use parentheses to control evaluation current_temp > hot_temp and chance_of_rain > 0.4 or chance_of_clouds > 0.5 (current_temp > hot_temp and chance_of_rain > 0.4) or chance_of_clouds > 0.5 same as first version, by default ands and ors are evaluated left to right current_temp > hot_temp and (chance_of_rain > 0.4 or chance_of_clouds > 0.5) Practice: write an absolute value function Let’s imagine our guessing game is played over many rounds We might copy and paste the code for each round with minor changes Is this a place where a function would be useful? What part of the code should be moved into a function and what would it look like? Partner activity Here is a common interview question in CS. Write a program called fizzbuzz.py that asks the user to input a number num and outputs the following. Outputs “fizz” if num is divisible by 3,Outputs “buzz” if num is divisible by 5,Outputs “fizzbuzz” if num is divisible by both 3 and 5, andOutputs num otherwise. Modify your program so that it also outputs “jazz” if num is divisible by 7. Note that it should also output “fizzjazz” if it is divisible by 3 and 7, and so on for all other combinations above