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is keyword in Python

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  • Difficulty Level : Medium
  • Last Updated : 26 Mar, 2020
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In programming, a keyword is a “reserved word” by the language which conveys special meaning to the interpreter. It may be a command or a parameter. Keywords cannot be used as a variable name in the program snippet. Python language also reserves some of the keywords that convey special meaning. In Python, keywords are case sensitive.

is keyword

This keyword is used to test object identity. The “is keyword” is used to test whether two variables belong to the same object. The test will return True if the two objects are the same else it will return False even if the two objects are 100% equal.

Note: The == operator is used to test if two objects are the same.

Syntax:

a is b

# Using if statement
if a is b:
    statement(s)

Example 1:




# Python program to demonstrate
# is keyword
  
  
x = ["a", "b", "c", "d"]
  
y =  ["a", "b", "c", "d"]
  
print(x is y)
print(x == y)

Output :
False
True

Example 2:




# Python program to demonstrate
# is keyword
  
  
x = 10
y = 10
  
if x is y:
    print(True)
else:
    print(False)

Output:

True
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