Python Even or Odd – Check if Number is Even or Odd Using % Operator

In Python, we can check if a number is even or odd very easily with the Python built in remainder operator %. If the remainder of a number after dividing by 2 is 0, then the number is even. If not, the number is odd.

def isEven(num):
    if (num % 2) == 0:
        return True
    else:
        return False

print(isEven(10))
print(isEven(15))

#Output:
True
False

When working with numbers in Python, it can be useful to know if the numbers you are working with are even or odd.

We can use the Python built in remainder operator % to get the remainder of a number after division.

To determine if a number is even using Python, we divide by 2. If the remainder after division is 0, then the number is even. If it is not 0, then the number is even.

Below is a function which will check if a number is even or odd in Python.

def isEven(num):
    if (num % 2) == 0:
        return True
    else:
        return False

print(isEven(10))
print(isEven(15))

#Output:
True
False

How to Check if a Number is Odd Using Python

To check if a number is odd using Python, we can use the Python remainder operator % in the same way as when we check if a number is even.

The difference is that the remainder for odd numbers after dividing by 2 is 1.

Below is a function which will check if a number is odd in Python.

def isOdd(num):
    if (num % 2) == 1:
        return True
    else:
        return False

print(isOdd(10))
print(isOdd(15))

#Output:
False
True

How to Determine if a Number is Divisible by Another Number

Using the Python remainder operator %, we can determine if a number is divisible by any other number.

For example, if we want to determine if a number is divisible by 3, we can use % with “3” in the following Python code.

def isDivisibleBy3(num):
    if (num % 3) == 0:
        return True
    else:
        return False

print(isDivisibleBy3(10))
print(isDivisibleBy3(15))

#Output:
False
True

If we want to check if a number is divisible by 5, just put 5 after the % operator.

def isDivisibleBy5(num):
    if (num % 5) == 0:
        return True
    else:
        return False

print(isDivisibleBy5(10))
print(isDivisibleBy5(15))

#Output:
True
True

Hopefully this article has been useful for you to understand how to determine if a number is even or odd in Python.