Learning Python: The Ultimate Guide for Beginners to Coding with Python with Useful Tools

Modulo Operator
Already,  you  should  know  that  we  have  an  important  operator  to  use  in  manipulating  numerical
values. Besides the popular addition, subtraction, multiplication, and division, we also have a unique
operator called the “modulo operator.” It is represented by the percentage (%) sign and returns the
remainder of a number divided by another. 
>>> 10 % 4
2
>>> 7 % 4
3
>>> 20 % 5
0
>>> 5 % 4
1
>>> 3 % 3

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0
Note:   The operator does not tell us the number of times the number fits in the other number, rather
it tells us the reminder of the operator. For instance, the first example, which is 10 divided by 4, what
the  module  operator  does  here  is  to  return  the  reminder  when  the  division  takes  place.  In  this
situation,  it  returns  the  value  2  because  4  can  only  go  into  10  twice  and  with  2  remaining.
Interestingly, you can use this to ascertain if a particular number is odd or even. Let see how that
works out:
num = input(“Key in a number of your choice, and I will let you know if it is odd or even: “)
num = int(num)
if num % 2 == 0:
print (f “\nThe number you enter {num} is an even number.”)
else
print( f “\nThe number you enter {num} is an odd number. “)
Even numbers are numbers we can divide by two. Therefore, when a number modulo and two are
equivalent to zero, then the number is even. However, if it turns out otherwise, then it is even. Let us
run the program and assume that you insert 46.
Key in a number of your choice, and I will let you know if it is odd or even: 46
The number you entered is an even number

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