Python | cmp() function
cmp() method in Python compares two integers and returns -1, 0, 1 according to comparison.
Syntax: cmp(a, b) Parameters: a and b are the two numbers in which the comparison is being done. Returns: -1 if a<b 0 if a=b 1 if a>b
# Python program to demonstrate the # use of cmp() method # when a<b a = 1 b = 2 print(cmp(a, b)) # when a = b a = 2b = 2 print(cmp(a, b)) # when a>b a = 3b = 2 print(cmp(a, b)) |
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Output:
-1 0 1
Practical Application: Program to check if a number is even or odd using cmp function.
Approach: Compare 0 and n%2, if it returns 0, then it is even, else its odd.
Below is the Python implementation of the above program:
# Python program to check if a number is # odd or even using cmp function # check 12 n = 12 if cmp(0, n % 2): print"odd"else: print"even" # check 13 n = 13 if cmp(0, n % 2): print"odd"else: print"even" |
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Output:
even odd
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