Module 2, 2.1.3 Python Operators
Hierarchy of Priorities
Causes some operators to act before others. It assumes that operators of a larger (higher) priority perform their operations before the operators of a lower priority.
Expressions
Comprised of data and operators.
The // operator.
integer division (floor division)
Right-sided binding operator
Evaluate the expression, print(2 ** 2 ** 3) from right to left: 2 ** 3 gives 8, and then 2 ** 8 gives 256.
Left-sided binding operator
Evaluate the expression, print(9 % 6 % 2) from left to right: first 9 % 6 gives 3, and then 3 % 2 gives 1.
T/F The code print(2.**3) will result in an 8 being displayed in the output.
False
T/F The code print(6 / 3) will result in an integer.
False
T/F The code print(6. // 4) will result in a 1 being displayed in the output.
False
The * operator.
multiplication
urary
Operator with one operand.
Binary
Operator with two operands.
floor division
The operation that divides two numbers and rounds to the lesser integer.
T/F The code print(2**3) will result in an 8 being displayed in the output.
True
T/F The code print(6 / 3) will result in a float.
True
T/F The code print(6 // 4) will result in a 1 being displayed in the output.
True
T/F The code print(9 % 6 % 2) will result in a 1 being displayed in the output.
True
T/F The default result of the / division operator is always a float.
True
The / operator.
division
Operator examples
+, -, *, /, //, %, **
Operators defined
A python symbol that is able to operate on values.
Evaluate print(2 * 3 % 5)
Answer: 1
Evaluate print((5 * ((25 % 13) + 100) / (2 * 13)) // 2)
Answer: 10.0
Parentheses
Used as grouping symbols for operations. The operations within the parentheses are performed first.
integer vs float rule
When at least one argument is a float, the result is a float. When both arguments are integers the result is an integer. Except when / is the operator.
The ** operator.
exponentiation
%
remainder(modulo), does division and returns the remainder
