Beginner Python Concepts

Control Flow refers to the use of comparison logic to determine what to do next. By that, I mean using if, elif, else statements to filter what code to run based on certain conditions.

The test cases provided test some of the common "corner cases" you may want to test.

def control_flow(score):
  if score >= 90:
    return "A"
  elif score >= 80:
    return "B"
  elif score >= 70:
    return "C"
  elif score >= 60:
    return "D"
  else:
    return "F"
          
print(control_flow(1000000))
print(control_flow(95))
print(control_flow(90))
print(control_flow(89))
print(control_flow(85))
print(control_flow(75))
print(control_flow(65))
print(control_flow(59))
print(control_flow(0))
print(control_flow(-1000))

If and elif statements will execute if the expression equates to True or 1. If the expression evaluates down to any other value, the attached code won't execute.

Here are some examples of such:

You can also chain conditions in your if, elif, else statement blocks. This can be done with and, or, not, and xor.

Try changing the conditions

my_int = 5
if my_int < 10 and my_int > 0:
  print("It's between 0 and 10")
my_char = 'c'
to_search = "Does this string have your letter?"
if my_char not in to_search:
    print("Nope, my char is not in there!") 
if my_char not in to_search or 1:
    print("Either part can be true") 
if my_char not in to_search or 1 or my_int < -1000:
    print("You can have as many conditionals as you want!")  

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