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How to write Python to determine odd and even numbers

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Release: 2024-04-11 02:49:42
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The methods to use Python to determine odd and even numbers include: % remainder operator: If the number divided by 2 has a remainder of 1, it is an odd number, and a remainder of 0 is an even number. math.modulo function: Returns the remainder of the division of two numbers, equivalent to the % remainder operator but more efficient for large numbers.

How to write Python to determine odd and even numbers

How to use Python to determine odd and even numbers

In order to determine whether a number is odd or even, Python provides a simple Methods.

Use % remainder operator

  • Odd numbers: When a number is divided by 2, the remainder is 1.
  • Even numbers: When a number is divided by 2, the remainder is 0.

Therefore, we can use the % remainder operator to check the parity of a number. For example:

<code class="python"># 检查数字 5 是否为奇数
if number % 2 == 1:
    print("5 是奇数")
else:
    print("5 是偶数")</code>
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Using the modulo function

Python also provides the math.modulo function, which returns two numbers The remainder of division. This is the same as the % remainder operator, but more efficient for large numbers.

<code class="python">import math

# 检查数字 100 是否为偶数
if math.modulo(100, 2) == 0:
    print("100 是偶数")
else:
    print("100 是奇数")</code>
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Other methods

There are other methods to determine parity, for example:

  • Use bit operations: binary representation of odd numbers The last digit is 1, and the last digit of even numbers is 0.
  • Use logical operations: a number is XORed with 1, the result is 1 for an odd number, and the result is 0 for an even number.

But the above % remainder operator and math.modulo function are the simplest and most direct way to determine the parity of numbers.

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