Python Basics - Arithmetic Operators
June 29, 2019 |
python |
Python has several artithmetic operators: +, -, *, /, %, **, //.
+Addition
>>> print(3 + 2)
5
>>> print(5 + 3)
8
>>> print("Olá, " + "Mundo!")
'Olá, Mundo!'
>>> print(5 + 2 * 3) # Multiplication first
11
>>> print((5 + 2) * 3) # Parentheses first
21
-Subtraction
>>> print(3 - 2)
1
*Multiplication
>>> print(3 * 2)
6
>>> print(4 * 5)
20
>>> print("Ha" * 3)
'HaHaHa'
/Division
>>> print(9 / 2)
4.5
%Mod (the remainder after dividing)
>>> print(9 % 2) # 9 divided by 2 is 4 with a remainder of 1
1
>>> print(10 % 2) # 10 is even, so the remainder is 0
0
**Exponentiation (note that^does not do this operation, as you might have seen in other languages)
>>> print(3 ** 2) # 3 squared
9
>>> print(2 ** 8) # 2 to the power of 8
256
//Divides and rounds down to the nearest integer
>>> print(9 // 2)
4
>>> print(-9 // 2) # Watch out for negative numbers!
-5
+=Add and assign
>>> score = 10
>>> score += 5 # Adds 5 to the score
>>> print(score)
15
- Comparisons
>>> a = 10
>>> b = 20
>>> print(a == 10)
True
>>> print(a != b)
True
>>> print(a > b)
False
- Logical Operators
>>> idade = 25
>>> tem_cnh = True
>>> print(idade >= 18 and tem_cnh == True)
True
>>> print(not (5 > 10))
True