#Wei Liu
#11/9/2021
#U3M3A2.1
#We are learning about Boolean Expressions and Compound Conditionals

# not operator
print("not True = ", not True)
print("not False = ", not False)

```
not True = False
not False = True
```

# and operator
print("False and False = ", False and False)
print("False and True = ", False and True)
print("True and False = ", True and False)
print("True and True = ", True and True)

```
False and False = False
False and True = False
True and False = False
True and True = True
```

# or operator
print("False or False = ", False or False)
print("False or True = ", False or True)
print("True or False = ", True or False)
print("True or True = ", True or True)

```
False or False = False
False or True = True
True or False = True
True or True = True
```

print("True and not False =", True and not False)
print("False or not True = ", False or not True)

```
True and not False = True
False or not True = False
```

# [ ] Use relational and/or arithmetic operators with the variables x and y to write:
# 3 expressions that evaluate to True (i.e. x >= y)
# 3 expressions that evaluate to False (i.e. x <= y)
x = 84
y = 17
print("True Expression")
print(x>y)
print(x>=y)
print(y<x)
print(x!=y)
print(not(x==y))
print("False Expression")
print(x==y)
print(x<y)
print(x<=y)
print(not(x>y))

```
True Expression
True
True
True
True
True
False Expression
False
False
False
False
```

# [ ] Use the basic Boolean operators with the variables x and y to write:
# 3 expressions that evaluate to True (i.e. not y)
# 3 expressions that evaluate to False (i.e. x and y)
x = True
y = False
print("True Expression")
print(x or y)
print(not y)
print(x and not y)
print("False Expression")
print(x and y)
print(not x)
print(not x and y)

```
True Expression
True
True
True
False Expression
False
False
False
```

# Testing if x is outside the range [10, 20]
x = 11
(x < 10) or (x > 20)

# Testing if x is outside the range [10, 20]
x = 50
(x < 10) or (x > 20)

# Testing if x is a positive and odd number
x = 11
(x > 0) and (x % 2 != 0)

# Testing if x is a positive and odd number
x = -11
(x > 0) and (x % 2 != 0)

# Testing if x is a positive and odd number
x = 22
(x > 0) and (x % 2 != 0)

# Driver information
name = 'Colette'
age = 17
# Testing if name starts with `C` and the age is 18 or less
(name.startswith('C')) and (age <= 18)

# Driver information
name = 'John'
age = 17
# Testing if name starts with `C` and the age is 18 or less
(name.startswith('C')) and (age <= 18)

# [ ] Write an expression to test if x is an even number outside the range [-100, 100]
# Test your expression with:
# x = 104 (True)
# x = 115 (False)
# x = -106 (True)
# x = -99 (False)
x=int(input("Please enter a number: "))
(x % 2 == 0) and ((x < -100) or (x > 100))

# [ ] Write an expression to test if a string s starts and ends with a capital letter
# HINT: You might find the function `str.isupper()` useful
# Test your expression with
# s = "CapitaL" (True)
# s = "Not Capital" (False)
s=input("Please enter a string: ")
s[0].isupper() and s[-1].isupper

# [ ] Write an expression to test if a string s contains a numerical value
# then test if the value is greater than the value stored in x
# HINT: Use the functions `s.isnumeric()` and `float(s)`
s=input("Please enter a number")
x=24
if s.isnumeric():
if float(s)>x:
print("Is number greater than x! ")
else:
print("is number but not greater than x!")
else:
print("is not number")
# Test your expression with
# s = "39"
# x = 24
# Expression should yield True
# s = "a39"
# x = 24
# Expression should yield False

```
Is number greater than x!
```

x = 11
(x >= 10) and (x <= 20)

x = 30
(x >= 10) and (x <= 20)

x = 11
not((x < 10) or (x > 20))

x = 30
not((x < 10) or (x > 20))

# [ ] Write an expression equivalent to the one below
# to test if x is outside the range [10, 20] (seen in a previous example)
# (x < 10) or (x > 20)
# Test your expression with
# x = 11 (False)
# x = 50 (True)
x = int(input("Enter 11 or 50"))
not ((x>10) and (x<20))

# [ ] Write a second expression to test if x is an even number outside the range [-100, 100]
# Do NOT use the expression you wrote for a previous exercise
# Test your expression with:
# x = 104 (True)
# x = 115 (False)
# x = -106 (True)
# x = -99 (False)
x = int(input("Enter 104, 115, -106, or -99: "))
not ((x % 2 != 0) or ((x > -100) and (x <100)))

# Solicit user input
x = input("Enter an odd positive number: ")
# Convert the string input into int
x = int(x)
# Test number for validity
if ((x > 0) and (x % 2 != 0)):
print(x, "is a valid number")
else:
print(x, "is NOT a valid number")

```
3 is a valid number
```

# Solicit user input
y = input("Enter your birth year: ")
# Convert the string input into int
y = int(y)
# Check the decade membership
if (y < 1970):
print("You were born before 1970!")
elif (y >= 1970 and y < 1980):
print("You were born in the 70s!")
elif (y >= 1980 and y < 1990):
print("You were born in the 80s!")
elif (y >= 1990 and y < 2000):
print("You were born in the 90s!")
elif (y >= 2000 and y < 2010):
print("You were born in early 2000s!")
else:
print("You were born in the current decade!")

```
You were born in early 2000s!
```

# [ ] Write a program to validate that user input is outside the range [0, 100]
x=int(input("Please enter a number outside of 0 and 100"))
if(x<0 and x >100):
print("Correct input.")
else:
print("Incorrect input.")

```
Incorrect input.
```

# [ ] Write a program to ask a user for her/his BMI index, then display the user's BMI category
x=float(input("Please enter your BMI"))
if (x < 18.5):
print("Underweight")
elif (x >= 18.5 and x<= 24.9):
print("Normal Weight")
elif (x >= 25 and x <= 24.9):
print("OverWeight")
elif (x >= 30):
print("Obese")
else:
print("Please enter only 1 decimal")

```
Obese
```