1.6. Operators

1.6.1. Comparison Operators

• x < y - Less than

• x <= y - Less or equal

• x > y - Greater than

• x >= y - Greater or equal

• x == y - Equals

• x != y - Not Equals

  >>> 10 < 2
  False
  >>> 10 <= 2
  False
  >>> 10 > 2
  True
  >>> 10 >= 2
  True
  >>> 10 == 2
  False
  >>> 10 != 2
  True
  

  >>> x = 10
  >>> y = 2
  >>> x >= 2
  True
  

1.6.2. Arithmetic Operators

• + - Addition

• - - Subtraction

• * - Multiplication

• / - Division

  >>> 10 + 2
  12
  >>> 10 - 2
  8
  >>> 10 * 2
  20
  >>> 10 / 2
  5.0
  

  >>> x = 10
  >>> y = 2
  >>> x + y
  12
  

1.6.3. Power and Root

• a ** b - b power of the number a

• a ** (1/b) - b-th root of the number a

  >>> 10 ** 2
  100
  >>> 2 ** -1
  0.5
  >>> 1.337 ** 3
  2.389979753
  

  >>> 4 ** (1/2)
  2.0
  >>> 2 ** (1/2)
  1.4142135623730951
  >>> 27 ** (1/3)
  3.0
  

  >>> 4 ** 0.5
  2.0
  >>> 2 ** 0.5
  1.4142135623730951
  >>> 27 ** 0.333
  2.9967059728946346
  

1.6.4. Divisions

• / - Division

• // - True division (preserving data type)

• % - Modulo division (reminder)

  >>> 12 / 6
  2.0
  >>> 12 / 5
  2.4
  

  >>> 12 // 6
  2
  >>> 12 // 5
  2
  

  >>> 12 % 6
  0
  >>> 12 % 5
  2
  

Testing if value is even or odd is made with dividing using modulo (%) operator

>>> 12 % 2 == 0
True
>>> 11 % 2 == 0
False

1.6.5. Increment Operators

• += - Incremental addition

• -= - Incremental subtraction

• *= - Incremental multiplication

• /= - Incremental division

  >>> x = 10
  >>> x = x + 1
  >>> print(x)
  11
  

  >>> x = 10
  >>> x += 1
  >>> print(x)
  11
  

  >>> x = 10
  >>> x -= 1
  >>> print(x)
  9
  

  >>> x = 1
  >>> x++
  Traceback (most recent call last):
  SyntaxError: invalid syntax
  

  >>> x = 1
  >>> ++x
  1