Comparison Operators¶

Comparison operators compare values and return True or False.

Operator Summary¶

Operator	Description	Example	Result
`==`	Equal to	`3 == 3`	`True`
`!=`	Not equal to	`3 != 2`	`True`
`<`	Less than	`3 < 5`	`True`
`>`	Greater than	`3 > 5`	`False`
`<=`	Less than or equal	`3 <= 3`	`True`
`>=`	Greater than or equal	`5 >= 3`	`True`

print(5 > 3)    # True
print(5 < 3)    # False
print(5 >= 5)   # True
print(5 <= 4)   # False
print(5 == 5)   # True
print(5 != 5)   # False

Python handles mixed numeric types:

print(1 == 1.0)   # True
print(1 < 1.0)    # False
print(1 <= 1.0)   # True

Booleans can be compared:

print(True == True)    # True
print(True == False)   # False
print(True != False)   # True

Python allows chaining comparisons:

print(1 < 2 < 3)           # True
print(1 < 2 < 3 < 4 < 5)   # True
print(1 < 5 > 3)           # True (1 < 5 and 5 > 3)

This is equivalent to:

print(1 < 2 and 2 < 3)     # True

age = 25
if 18 <= age <= 65:
    print("Working age")

print(0.1 + 0.2 == 0.3)   # False!
print(0.1 + 0.2)          # 0.30000000000000004

Use approximate comparison:

import math
print(math.isclose(0.1 + 0.2, 0.3))  # True

# These are equivalent
print(10 <= 20 == 30 > 40)
print((10 <= 20) and (20 == 30) and (30 > 40))  # False

Operator	Compares	Example
`==`	Values	`[1,2] == [1,2]` → `True`
`is`	Identity	`[1,2] is [1,2]` → `False`

print(1 == 1.0 == True)  # True (True is 1)
print(0 == False)         # True

# Python 3: Cannot compare
print("5" > 3)  # TypeError

print(None == None)  # True
print(None is None)  # True (preferred)

if score >= 90:
    grade = 'A'
elif score >= 80:
    grade = 'B'
elif score >= 70:
    grade = 'C'
else:
    grade = 'F'