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# Operators

With every programming language we have our operators, and Python is no different. Operators in a programming language are used to vaguely describe 5 different areas: arithmetic, assignment, increment/decrement, comparison, logical. There isn’t really much need to explain all of them as I have previously in the other categories, which means we will only cover a few of them.

## Arithmetic Operators

Example
```print (3 + 4)
print (3 - 4)
print (3 * 4)
print (3 / 4)
print (3 % 2)
print (3 ** 4) # 3 to the fourth power
print (3 // 4) #floor division
```
Result 7
-1
12
0.75
1
81
0

See, they are pretty standard. I included how to do exponents because it’s a little funky, but other than that, they are fairly normal and work as expected. Don’t forget that you can use the + sign to concatenate strings. The addition, subtraction, multiplication, and division work just like expected. You might have not seen the modulus operator before (%). All the modulus operator does is to divide the left side by the right side and get the remainder. So, that remainder is what is returned and not the number of times the right number went into the left number The double * is just an easy way to provide exponents to Python. Finally, the floor division operator (//) just divides the number and rounds down.

## Assignment Operators

These are pretty identical to the previous languages also, but a refresher never hurt anyone. Example please!

Example
```a = 0
a+=2
print (a)
```
Result 2

Of course, you can do this with any of the previous arithmetic operators as an assignment operator followed by the = We just told Python to add 2 to the value of a without having to say something like a = a + 2. We are programmers, and we are proud to be called lazy!

• Stewart, Suzy. "Operators". After Hours Programming. Accessed on July 1, 2022. https://www.afterhoursprogramming.com/tutorial/python/operators-py/.

• Stewart, Suzy. "Operators". After Hours Programming, https://www.afterhoursprogramming.com/tutorial/python/operators-py/. Accessed 1 July, 2022.

### 49 thoughts on “Operators”

1. code simulator results out “print (3/4)” as 0, not 0.25.
There might be error…

2. You showed us how to round down in that example, is there a way for us to round up?

3. 4. print(3+4)
print(3-4)
print(3*4)
print (3/4)
print(3%4)
print(3**4)# 3 to the forth power
print (3//4)# flour division

a=0
a+=2
print(a)

5. print(3+4)
print(3-4)
print(3*4)
print (3/4)
print(3%4)
print(3**4)# 3 to the forth power
print (3//4)# flour division

a=0
a+=2
print(a)

6. a = 0
a+=777
a-=3
a*=2
print (a)

7. print (50 % 20)

8. print(a/b) where a and b are both numerics doesn’t show the disire result.

9. Where can I learn what the other operators do? I need more information I’m just starting out and I want to cover all my bases.

10. print (3 / 4) doesn’t work

11. print (3 / 4) doesn’t work

12. I just spent some time trying to learn Java (and gave up). It hurt my head with all the syntax to remember.

13. print float(4/3)

14. 3//4=0 its because it was rounded down. so 0.75 rounded down is 0

15. print(1/2) is generating output 0.I think that’s not desired result

16. print (3 / 4) gives 0 on my local setup since it is Python 2.7. But why is the code simulator also giving 0? code simulator should be using Python 3, isn’t it ? Thanks

17. @Aeschere thanks that helped

18. blowout soon stalker

19. This is a very good tutorial.

20. practice makes perfect

21. @Wertb

If you look at the example the result of 3 / 4 = 0.75, this is the result of a normal division.
The result of 3 // 4 = 0 since this is a so called floor division which rounds down the answer.

If you are trying the code on your own system and get 0 as a result when you are executing 3 / 4 it means that you are using Python 2 instead of Python 3. You can get the correct result in Python 2 by using 3.0 / 4.0.

22. Why is the result of 3 / 4 = 0?

23. Could someone provide an example of when the assignment operator would come in handy? Why wouldn’t I just change my code to be what I need it to be? so instead of

a = 1
a+ = 2
print (a)

3

Why wouldn’t I just do a = 3?

Thanks!

24. I can see this coming in handy later on.
a=4
a+=3
print(a)

Result 7

25. Programmers ain’t lazy! rather we make stuff easy

b=39
b+=70
print(b)

Result 109

26. Lovely!!

Some other examples:
a=3
a-=-1
print (a)

b=2
b+=-2
print (b)

c=2
c**=3
print (c)

d=6
d//=2
print (d)

27. I have studied Python for like… a hundred times! And i also created like… 3 Games and 10 Programs! (Im not Bragging) But still im gonna study it over and over again to improve my skill so keep up the good work programmers!

28. I have ZERO experience on python or any programming tool for that matter. I have done some simulators and i see a lot of options :D

29. what a great learning place

30. This site help me a lot to understand python. It is very helpful for self learning.

31. Ok i was a little confused for a bit with the a+=2, but then i read it over twice.

32. I am new to python, but i think this lesson so easy.

33. Lol I have no clue what you guys are talking about… Wish me luck plz!

34. Nice shortcut bro

#lazyprogrammingftw

35. Thanks for the pointer He3ek i understand the (a+=2) now

36. This is quit different of other programming languages like C or VB. It seams to me Python is more easier.

37. The "a+=2" expression increases the value of the original "a" by the numerical value.
If you set "a" at a value of "2", and then later need the value of "a" to be larger or smaller you would use the "aÂ±=2" (respective of what you need, add or subtract), to increase or decrease the earlier set value of "a".

38. Ever best understanding of operators now :-) Thanks Man

39. the line ‘ We are programmers, and we are proud to be called lazy!’ is something I never heard……all I have heard is ‘we are programmers , and people see us as alien’

40. wonderful

41. Is it correct that the result should br .75?
Should it be casted as a float to have that result?

42. where is the like button?

43. Might be better if your modulo, floor division, and division examples all used the same divisor and dividend to clarify the difference between division, floor division, and modulo (6/4=1r2, 6%4=2, and 6//4=1)

44. These tutorials are helping me on my way to becoming a software developer, thanks for the help!

45. Great. But must say what ++ or — is absent in Python. And += and others is separate statement. Par exemple b = (a+=2) * (a*=4) is not a valid.

46. this topic is simple but useful.

47. Sudha not equal to can be written in multiple ways <> or != I prefer the != Method

48. could you please let me know what is the symbol for not equal to

• != this sign represents not equal

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