if-elif-else Statements Exercises

1. Syntax for if Statements:

   if condition:
       indentedStatementBlockForTrueCondition
   

2. Syntax for if-else Statements:

   if condition:
       indentedStatementBlockForTrueCondition
   else:
       indentedStatementBlockForFalseCondition
   

3. Syntax for if-elif-else Statements:

   if condition1:
       indentedStatementBlockForTrueCondition1
   elif condition2:
       indentedStatementBlockForTrueCondition2
   elif condition3:
       indentedStatementBlockForTrueCondition3
   elif condition4:
       indentedStatementBlockForTrueCondition4
   else:
       indentedStatementBlockForAllFalseCondition
   

4. How else can we write the if-elif-else statements below (without using an elif)?

   # Given an age from the user and whether or not they're showing significant signs of independence,
   # display if the person is a teenager, acting like one or is neither
   import sys
   
   age = int(input("Please enter the age: "))
   
   userResponse = input("Is the person showing significant signs of independence? (yes/no) ").lower()
   if userResponse == "yes":
       showingSignsOfIndependence=True
   elif userResponse == "no":
       showingSignsOfIndependence=False
   else:
       print("ERROR: Please answer yes or no!")
       sys.exit(1)
   
   if (age >= 13) and (age <= 19):
       print("Teenager")
   elif (age < 13) and showingSignsOfIndependence == True:
       print("Acting like a teenager")
   else:
       print("Not a teenager")
   

5. Animal Guessing Game:
   Extend the following game by adding in more questions and guesses:

   rightMsg = "Yeah, that was fun!"
   wrongMsg = "What was it and what question could extend this game?"
   
   print("Think of an animal")
   
   response = input("Does it fly? (yes/no) ")
   if response == "yes":
       response = input("Is it an eagle? (yes/no) ")
       if response == "yes":
           print(rightMsg)
       else:
           print(wrongMsg)
   else:
       response = input("Does it run really fast? (yes/no) ")
       if response == "yes":
           response = input("Is it a cheetah? (yes/no) ")
           if response == "yes":
               print(rightMsg)
           else:
               print(wrongMsg)
       else:
           print(wrongMsg)
   

6. Write a complete python script that asks the user for their overall grade percentage in this class. Display the appropriate letter grade.
   Example:

   Please enter your overall grade (ex: 98.7): 91
   91.0% is an 'A'

7. Loops and branching
   1. Write a complete python script that displays the following grade information:

      59% is an 'F'
      60% is a 'D'
      61% is a 'D'
      62% is a 'D'
      63% is a 'D'
      64% is a 'D'
      65% is a 'D'
      66% is a 'D'
      67% is a 'D'
      68% is a 'D'
      69% is a 'D'
      70% is a 'C'
      71% is a 'C'
      72% is a 'C'
      73% is a 'C'
      74% is a 'C'
      75% is a 'C'
      76% is a 'C'
      77% is a 'C'
      78% is a 'C'
      79% is a 'C'
      80% is a 'B'
      81% is a 'B'
      82% is a 'B'
      83% is a 'B'
      84% is a 'B'
      85% is a 'B'
      86% is a 'B'
      87% is a 'B'
      88% is a 'B'
      89% is a 'B'
      90% is an 'A'
      91% is an 'A'
      92% is an 'A'
      93% is an 'A'
      94% is an 'A'
      95% is an 'A'
      96% is an 'A'
      97% is an 'A'
      98% is an 'A'
      99% is an 'A'
      100% is an 'A'

   2. Now extend your script to add in a blank line between each letter grade:

      59% is an 'F'
      	    
      60% is a 'D'
      61% is a 'D'
      62% is a 'D'
      63% is a 'D'
      64% is a 'D'
      65% is a 'D'
      66% is a 'D'
      67% is a 'D'
      68% is a 'D'
      69% is a 'D'
      
      70% is a 'C'
      ...