# If-else statement
variable = 18
if variable >= 10:
    print("variable >= 10")
else:
    print("variable < 10")

# If-elif-else statement
variable = 85
if variable >= 90:
    print("Grade: A")
elif variable >= 80:
    print("Grade: B")
elif variable >= 70:
    print("Grade: C")
else:
    variable("Grade: F")