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Consider below statements in Python 2.7

# A Python 2.7 program to demonstrate use of 
# "/" for integers
print 5/2
print -5/2

Output:

2
-3
division in python

First output is fine, but the second one may be surprising if we are coming Java/C++ world. In Python 2.7, the “/” operator works as a floor division for integer arguments. However, the operator / returns a float value if one of the arguments is a float (this is similar to C++)

python - Sample - python code :

# A Python 2.7 program to demonstrate use of 
# "/" for floating point numbers
print 5.0/2
print -5.0/2

Output:

2.5
-2.5

The real floor division operator is “//”. It returns floor value for both integer and floating point arguments.

python - Sample - python code :

# A Python 2.7 program to demonstrate use of 
# "//" for both integers and floating points
print 5//2
print -5//2
print 5.0//2
print -5.0//2

Output:

2
-3
2.0
-3.0

How about Python 3?
Here is another surprise, In Python 3, ‘/’ operator does floating point division for both int and float arguments.

python - Sample - python code :

# A Python 3 program to demonstrate use of 
# "/" for both integers and floating points
print (5/2)
print (-5/2)
print (5.0/2)
print (-5.0/2)

Output:

2.5
-2.5
2.5
-2.5

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