Lecture_1_Conditionals.py

#==================Calculator.py===========================

#basic conditional code using if, elif and else
x = int(input("What's x?"))
y = int(input("What's y?"))
if x < y:
    print ("x is less than y")
elif x > y:
    print ("x is greater than y")
else:
    print ("x is equal to y")

#basic conditional code using if, or and else
x = int(input("What's x?"))
y = int(input("What's y?"))
if x < y or x > y:
    print("x is not equal to y")
else:
    print ("x is equal to y")

#making it more easy and compact
x = int(input("What's x?"))
y = int(input("What's y?"))
if x!=y:
    print("x is not equal to y")
else:
    print ("x is equal to y")
    
#==================Grade.py===========================

#using and as conditional
score = int(input("Score: "))
if score >= 90 and score <= 100:
    print("Grade: A")
elif score >= 80 and score <= 90:
    print("Grade: B")
elif score >= 70 and score <= 80:
    print("Grade: C")
elif score >= 60 and score <= 80:
    print("Grade: D")
else:
    print("Grade: F")

#simplifying above code
score = int(input("Score: "))
if 90 <= score <= 100:
    print("Grade: A")
elif 80 <= score <= 90:
    print("Grade: B")
elif 70 <= score <= 80:
    print("Grade: C")
elif 60 <= score <= 70:
    print("Grade: D")
else:
    print("Grade: F")
    
=================================
#1
x = int(input("What's x?"))

if x % 2 == 0:
    print("Even")
else:
    print ("Odd")

#2
def main():
    x = int(input("What's x?"))
    if is_even(x):
        print("Even")
    else:
        print("Odd")

def is_even(n):
    if n % 2 == 0:
        return True
    else:
        return False
    
main()

#3
def main():
    x = int(input("What's x?"))
    if is_even(x):
        print("Even")
    else:
        print("Odd")

def is_even(n):
    return True if n % 2 == 0 else False
    
main()

#4
def main():
    x = int(input("What's x?"))
    if is_even(x):
        print("Even")
    else:
        print("Odd")

def is_even(n):
    return n % 2 == 0
    
main()

===========================================

#1
name = input("What's your name?")

if name == "Harry":
    print ("Gryffindor")
elif name == "Hermione":
    print ("Gryffindor")
elif name == "Ron":
    print ("Gryffindor")
elif name == "Draco":
    print ("Slytherin")
else:
    print ("Who?")

#2
name = input("What's your name?")

if name == "Harry" or name == "Hermione" or name == "Ron":
    print ("Gryffindor")
elif name == "Draco":
    print ("Slytherin")
else:
    print ("Who?")

#3
name = input("What's your name?")

match name:
    case "Harry":
        print("Gryffindor")
    case "Hermione":
        print("Gryffindor")
    case "Ron":
        print("Gryffindor")
    case "Draco":
        print("Slytherin")
    case _:
        print("Who?")

#4
name = input("What's your name?")

match name:
    case "Harry" | "Hermione" | "Ron":
        print("Gryffindor")
    case "Draco":
        print("Slytherin")
    case _:
        print("Who?")

======================================