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Типи Даних у Python

bookБазова Арифметика та Пріоритет Операторів

You'll use arithmetic operators constantly in Python. Consider the most common ones and how precedence determines evaluation order.

Main Operations


              
12345678

            
a = 10
b = 3

print(a + b)  # Addition
print(a - b)  # Subtraction
print(a * b)  # Multiplication
print(a / b)  # Division
print(a ** b)  # Exponentiation
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Operator Precedence

When multiple operators appear, Python evaluates them in this order (highest → lowest among arithmetic):

  1. **;
  2. Unary + and - (sign);
  3. *, /;
  4. +, -.

Parentheses always win and make intent explicit. Exponentiation ** is right-associative.


              
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print(2 + 3 * 4)     # 14  (multiplication before addition)
print((2 + 3) * 4)   # 20  (parentheses change the order)

# Exponentiation binds tighter than unary minus
print(-3 ** 2)       # -9  (equivalent to -(3 ** 2))
print((-3) ** 2)     # 9

# Right-associative exponentiation
print(2 ** 3 ** 2)   # 512 (2 ** (3 ** 2))
copy
Note
Note
  • Prefer parentheses in anything nontrivial, readability > cleverness.
  • Remember / always yields a float (even if divisible).

1. What value will this code output?

2. Which expression evaluates to 64?

3. What value will this code output?

question mark

What value will this code output?

Select the correct answer

question mark

Which expression evaluates to 64?

Select the correct answer

question mark

What value will this code output?

Select the correct answer

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You'll use arithmetic operators constantly in Python. Consider the most common ones and how precedence determines evaluation order.

Main Operations


              
12345678

            
a = 10
b = 3

print(a + b)  # Addition
print(a - b)  # Subtraction
print(a * b)  # Multiplication
print(a / b)  # Division
print(a ** b)  # Exponentiation
copy

Operator Precedence

When multiple operators appear, Python evaluates them in this order (highest → lowest among arithmetic):

  1. **;
  2. Unary + and - (sign);
  3. *, /;
  4. +, -.

Parentheses always win and make intent explicit. Exponentiation ** is right-associative.


              
123456789

            
print(2 + 3 * 4)     # 14  (multiplication before addition)
print((2 + 3) * 4)   # 20  (parentheses change the order)

# Exponentiation binds tighter than unary minus
print(-3 ** 2)       # -9  (equivalent to -(3 ** 2))
print((-3) ** 2)     # 9

# Right-associative exponentiation
print(2 ** 3 ** 2)   # 512 (2 ** (3 ** 2))
copy
Note
Note
  • Prefer parentheses in anything nontrivial, readability > cleverness.
  • Remember / always yields a float (even if divisible).

1. What value will this code output?

2. Which expression evaluates to 64?

3. What value will this code output?

question mark

What value will this code output?

Select the correct answer

question mark

Which expression evaluates to 64?

Select the correct answer

question mark

What value will this code output?

Select the correct answer

Все було зрозуміло?

Як ми можемо покращити це?

Дякуємо за ваш відгук!

Секція 1. Розділ 2
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