These Guys? Wait, What? Really?

 Branching is a fundamental part of programming  It means taking an action based on decision  The decision is dependent on a condition if hungry take a bite if thirsty take a drink

 If statements must have a condition  The statement, “It’s 100 degrees outside” ◦ Is either true or false; we say, “evaluates to true or false” ◦ Helps us determine what to do next

 Comparison Operators help us evaluate conditions to true or false OperatorMeaningSample Condition Evaluates To ==Equal to5 == 5True !=Not equal to 8 != 5True >Greater than 3 > 10False <Less than5 < 8True >=Greater than or equal to 5 >= 10False <=Less than or equal to 5 <= 5True

 By indenting a line, it becomes a block  A block is one or more consecutive lines indented by the same amount  Indenting sets lines off visually and logically If (authenticated is True) : print(“Access Granted”) print(“Welcome!”)

 If  Followed By A Condition  Followed By A Colon  Followed By A Block  If the condition evaluates to ‘True’, the block is executed

 Helps make a choice based on a condition  Do one thing if the condition is true, else do something else if it is false password = input(“Please enter password”) if (password == ‘secret’) : print(“Access Granted”) else : print(“Access Denied”)

 elif is short for ‘else if’; programmers are lazy and don’t want to type ‘else if’ when they can type ‘elif’  Allows the programmer to create a sequence of conditions to be evaluated

if (testScore >= 90) : grade = “A” elif (testScore >= 80) : grade = “B” elif (testScore >= 70) : grade = “C” elif (testScore >= 60) : grade = “D” else : grade = “F”

 You can add more than one condition in the overall condition by adding ‘and’ and ‘or’  The overall condition is still evaluated to True or False if (hungry and thirsty) : takeABite() takeADrink() if (hungry or thirsty) stopAtMcDonalds()

 Write a main function  Ask the user for his/her age and store it in a variable ‘age’  Convert age to an integer using the int() function  If your age is greater than 18, print, “You can vote” If the age is less than 18 print, “You cannot vote”

 Write a main function that asks the user for his/her age and store it in a variable ‘age’  Ask the user if he or she is a citizen. (yes or no) and store the result in a variable ‘citizen’  If your age is > 18 and you are a citizen, print, “You can vote”. Otherwise, print, “You cannot vote”

 Write a main function. Ask the user to enter the temperature; convert it to an integer  If the temperature is > 80, turn the air conditioner on and make sure the heater is off  If the temperature is between 65 and 79 turn the air conditioner off and make sure the heater is off  If the temperature is below 65 turn the heater on and make sure the air conditioner is off