python关键字和保留字

Python或关键字 (Python or keyword)

or is a keyword (case-sensitive) in python, it is a logical operator actually, it is used to validate more than one conditions. It is similar to Logical OR (||) operator in C, C++ programming. It requires a minimum of two conditions and returns True – if one or more condition(s) is/are True.

还是 python中的一个关键字(区分大小写)，实际上它是一个逻辑运算符，用于验证多个条件。 它类似于C ， C ++编程中的逻辑OR(||)运算符。 它至少需要两个条件并返回True –如果一个或多个条件为True 。

Truth table for "or" keyword/operator

“或”关键字/运算符的真值表

Condition1 Condition2  (Condition1 or Condition2)
True        True        True
True        False       True
False       True        True
False       False       False

Syntax of or keyword/operator:

或关键字/运算符的语法：

    condition1 or condition2

Example:

例：

    Input:
a = 10
b = 20
# conditions
print(a>=10 or b>=20)
print(a>10 or b>20)
Output:
True
False

或运算子的Python范例 (Python examples of or operator)

Example1: Take two numbers and test the conditions using or operator

例1：取两个数字并使用或运算符测试条件

# python code to demonstrate example of
# or  keyword/operator
a = 10
b = 20
# printing return values
print(a>=10 or b>=20)
print(a>10 or b>20)
print(a==10 or b==20)
print(a==10 or b!=20)

Output

输出量

True
False
True
True

Example 2: Input a number and check whether it is divisible by 2 or 3

示例2：输入一个数字并检查它是否可以被2或3整除

# Input a number and check whether
# it is divisible by 2 or 3
# input
num = int(input("Enter a number: "))
# checking num is divisible by 2 or 3
if num%2==0 or num%3==0:
print("Yes, ", num, " is divisble by 2 or 3")
else:
print("No, ", num, " is not divisble by 2 or 3")

Output

输出量

First run:
Enter a number: 66
Yes,  66  is divisble by 2 or 3
Second run:
Enter a number: 5
No,  5  is not divisble by 2 or 3

Example 3: Input a string and check whether it is "Hello" or "World"

示例3：输入一个字符串并检查它是“ Hello”还是“ World”

# Input a string and check
# whether it is "Hello" or "World"
# input
string = input("Enter a string: ")
# checking the conditions
if string=="Hello" or string=="World":
print("Yes, \"", string, "\" is either \"Hello\" or \"World\"")
else:
print("No, \"", string, "\" is neither \"Hello\" nor \"World\"")

Output

输出量

First run:
Enter a string: Hello
Yes, " Hello " is either "Hello" or "World"
Second run:
Enter a string: World
Yes, " World " is either "Hello" or "World"
Third run:
Enter a string: IncludeHelp
No, " IncludeHelp " is neither "Hello" nor "World"

翻译自: https://www.includehelp.com/python/or-keyword-with-example.aspx

python关键字和保留字