module2_3 Operators смотреть онлайн

Calculator
print(2+2)
Basic operators
able to operate on the values
+, -, *, /, //, %, **
Data and operators when connected together form expressions
Arithmetic operators: exponentiation
print(2 ** 3.0)
23
• when both arguments are integers, the result is an integer, too;
• when at least one argument is a float, the result is a float, too.
Arithmetic operators: multiplication
print(2 * 3)
Arithmetic operators: division (always float)
print(6. / 3.)
Arithmetic operators: integer division (always int)
print(6 // 3)

rounding always goes to the lesser integer (5.9=5)
print(-6 // 4)
print(6. // -4)

Integer division can also be called floor division

Operators: remainder (modulo)
print(14 % 4) = 2

Do not try to:
• perform a division by zero;----- infinity (X) /
• perform an integer division by zero; //
• find a remainder of a division by zero. %

Operators: addition
print(-4 + 4) int
print(-4. + 8) float
Operators: subtraction
print(-4 - 4)
print(4. - 8)
print(-1.1)

print(+2)



Operators and their bindings BODMAS
2 + 3 * 5
print(9 % 6 % 2)
left-sided binding

Operators and their bindings: exponentiation
right-sided binding
print(2 ** 2 ** 3)
• 2 ** 2 → 4; 4 ** 3 → 64
• 2 ** 3 → 8; 2 ** 8 → 256
Priority Operator
1 +, - Unary ******
2 **
3 *, /, %
4 +, - binary

Operators and parentheses
print((5 * ((25 % 13) + 100) / (2 * 13)) // 2)