set a to 10
set b to 3

set sum to a plus b          # Addition: 13
set diff to a minus b        # Subtraction: 7
set prod to a times b        # Multiplication: 30
set quot to a divided by b   # Division: 3.333...
set mod to a mod b           # Modulo: 1

set x to 10
set neg to -x                # -10

set x to 10
set y to 5

x is equal y                 # false
x is not equal y             # true
x is greater than y          # true
x is less than y             # false
x is greater than or equal y # true
x is less than or equal y    # false

set a to true
set b to false

a and b                      # false
a or b                       # true
not a                        # false

set result to (10 plus 5) times 2    # 30
set result2 to 10 plus (5 times 2)   # 20

# Complex expressions
set score to 85
if score is greater than 80 and score is less than 90:
    print "Grade: B"

# Arithmetic with comparisons
set x to 10
set y to 20
if (x plus y) is greater than 25:
    print "Sum is greater than 25"

# Logical combinations
set is_weekend to false
set is_holiday to true
if is_weekend or is_holiday:
    print "No work today!"