i need help understanding modulo and // in pyhthon… there doesnt means any sense to me//… 100 % 5 and 100 // 5

This is code help, so it should have gone in that section, but I can still help. Modulo returns the remainder of the division, so a % b returns the remainder of a divided by b. // Is the floor division operator. This means it returns the greatest integer that is still less than the quotient. Thus a // b returns a/b rounded down.

Here’s quick explanation, although Thomas already said what it is.

`//`

means floor division, so it’s just like `/`

except it rounds the number down to the nearest integer, it’s important to note that it rounds down, so even if the number is something like `1.99`

it will still output `1`

The percent sign `%`

returns the remainder, it’s often used to check if a number is even or odd

Some Examples:

### Floor Division

```
x = 10 / 5
print(type(x)) # type is float
x = 10 // 5
print(type(x)) # type is int
```

### Remainders

```
def is_even(number):
if number % 2 == 0: # if the remainder is 0
return True
else:
return False
is_even(21) # False
is_even(10) # True
```

@InvisibleOne gave an excellent reply. The only thing I could add is *why* to use integer divide.

Imagine that you have 85 people, and you want to know how many full soccer teams (11 people each) you can create.

85/11 = 7.727272727…

85//11 = 7

You could use the regular division and then int():

int(85/11) = 7

but the floor division is such a common thing to do that they have provided a shortcut.

It’s the least I can do after all the help Ask has given me with my own code. Gotta pay it forward.