Operators

# Basic math
print(10 + 3)   # 13 - Addition
print(10 - 3)   # 7  - Subtraction
print(10 * 3)   # 30 - Multiplication
print(10 / 3)   # 3.333... - Division (always gives float)

# Special operators
print(10 // 3)  # 3  - Floor division (rounds down)
print(10 % 3)   # 1  - Modulo (remainder)
print(10 ** 3)  # 1000 - Exponent (power)

result = 2 + 3 * 4      # 14 (not 20!)
result = (2 + 3) * 4    # 20 (parentheses first)

age = 18

print(age == 18)    # True  - Equal to
print(age != 21)    # True  - Not equal to
print(age > 17)     # True  - Greater than
print(age < 20)     # True  - Less than
print(age >= 18)    # True  - Greater than or equal
print(age <= 18)    # True  - Less than or equal

age = 25
has_license = True

# AND - both must be true
can_drive = age >= 16 and has_license
print(can_drive)  # True

# OR - at least one must be true
day = "Saturday"
is_weekend = day == "Saturday" or day == "Sunday"
print(is_weekend)  # True

# NOT - reverses the value
is_adult = age >= 18
is_child = not is_adult
print(is_child)  # False

# AND: Both must be True
print(True and True)    # True
print(True and False)   # False
print(False and False)  # False

# OR: At least one must be True  
print(True or False)    # True
print(False or False)   # False

# NOT: Flips the value
print(not True)         # False
print(not False)        # True

# Instead of:
score = score + 10

# Write:
score += 10

# Works with all operators
x = 10
x += 5    # x is now 15
x *= 2    # x is now 30