How do you divide 2 in python?
How can I divide two numbers in Python 2.7 and get the result with decimals? Show
I don't get it why there is difference: in Python 3:
in Python 2:
Isn't this a modulo actually?
Håken Lid 21.5k9 gold badges47 silver badges64 bronze badges asked Jan 23, 2014 at 18:54
4 In Python 2.7, the If you want float division (which is something I always prefer), just use this special import:
See it here:
Integer division is achieved by using
As commented by
answered Jan 23, 2014 at 19:01
bgusachbgusach 13.8k11 gold badges49 silver badges63 bronze badges 8 In Python 3, In Python 2, In both 2 and 3, (To get float division in Python 2 requires either of the operands be a float, either as answered Jan 23, 2014 at 18:56
mhlestermhlester 22.2k10 gold badges50 silver badges74 bronze badges 1 In Python 2.x, make sure to have at least one operand of your division in
answered Jan 23, 2014 at 19:00
woozykingwoozyking 4,6521 gold badge22 silver badges29 bronze badges "/" is integer division in Python 2, so it is going to round to a whole number. If you would like a decimal returned, just change the type of one of the inputs to float:
answered Jan 23, 2014 at 19:02
BryanBryan 1,74812 silver badges12 bronze badges Basics[edit | edit source]Python math works as expected: >>> x = 2 >>> y = 3 >>> z = 5 >>> x * y 6 >>> x + y 5 >>> y - x 1 >>> x * y + z 11 >>> (x + y) * z 25 >>> 3.0 / 2.0 # True division 1.5 >>> 3 // 2 # Floor division 1 >>> 2 ** 3 # Exponentiation 8 Note that Python adheres to the PEMDAS order of operations. Powers[edit | edit source]There is a built in exponentiation operator **, which can take either integers, floating point or complex numbers. This occupies its proper place in the order of operations. Floor Division and True Division[edit | edit source]In Python 3.x, slash operator ("/") does
true division for all types including integers, and therefore, e.g. In Python 3.x and latest 2.x, floor division for both integer arguments and floating-point arguments is achieved by using the double slash ("//") operator. For negative results, this is unlike the integer division in the C language since -3 // 2 == -2 in Python while -3 / 2 == -1 in C: C rounds the negative result toward zero while Python toward negative infinity. Beware that due to the limitations of floating point arithmetic, rounding errors can cause unexpected results. For example: >>> print(0.6/0.2) 3.0 >>> print(0.6//0.2) 2.0 For Python 2.x, dividing two integers or longs using the slash operator ("/") uses floor division (applying the floor function after division) and results in an integer or long. Thus, 5 / 2 == 2 and -3 / 2 == -2. Using "/" to do division this way is deprecated; if you want floor division, use "//" (available in Python 2.2 and
later). Dividing by or into a floating point number will cause Python to use true division. Thus, to ensure true division in Python 2.x: Links:
Modulus[edit | edit source]The modulus (remainder of the division of the two operands, rather than the quotient) can be found using the % operator, or by the divmod builtin function. The divmod function returns a tuple containing the quotient and remainder. >>> 10 % 7 3 >>> -10 % 7 4 Note that -10 % 7 is equal to 4 while it is equal to -3 in the C language. Python calculates the remainder as one after floor division while the C language calculates the remainder after C integer division, which differs from Python's floor division on integers: C integer division rounds negative results toward zero. Links:
Negation[edit | edit source]Unlike some other languages, variables can be negated directly: Comparison[edit | edit source]
Numbers, strings and other types can be compared for equality/inequality and ordering: >>> 2 == 3 False >>> 3 == 3 True >>> 3 == '3' False >>> 2 < 3 True >>> "a" < "aa" True Identity[edit | edit source]The operators >>> [1,2,3] == [1,2,3] True >>> [1,2,3] is [1,2,3] False For the built-in immutable data types (like int, str and tuple) Python uses caching mechanisms to improve performance, i.e., the interpreter may decide to reuse an existing immutable object instead of generating a new one with the same value. The details of
object caching are subject to changes between different Python versions and are not guaranteed to be system-independent, so identity checks on immutable objects like In some Python implementations, the following results are applicable: print(8 is 8) # True print("str" is "str") # True print((1, 2) is (1, 2)) # False - whyever, it is immutable print([1, 2] is [1, 2]) # False print(id(8) == id(8)) # True int1 = 8 print(int1 is 8) # True oldid = id(int1) int1 += 2 print(id(int1) == oldid)# False Links:
Augmented Assignment[edit | edit source]There is shorthand for assigning the output of an operation to one of the inputs: >>> x = 2 >>> x # 2 2 >>> x *= 3 >>> x # 2 * 3 6 >>> x += 4 >>> x # 2 * 3 + 4 10 >>> x /= 5 >>> x # (2 * 3 + 4) / 5 2 >>> x **= 2 >>> x # ((2 * 3 + 4) / 5) ** 2 4 >>> x %= 3 >>> x # ((2 * 3 + 4) / 5) ** 2 % 3 1 >>> x = 'repeat this ' >>> x # repeat this repeat this >>> x *= 3 # fill with x repeated three times >>> x repeat this repeat this repeat this Logical Operators[edit | edit source]Logical operators are operators that act on booleans. or[edit | edit source]The or operator returns true if any one of the booleans involved are true. If none of them are true (in other words, they are all false), the or operator returns false. if a or b: do_this else: do_this and[edit | edit source]The and operator only returns true if all of the booleans are true. If any one of them is false, the and operator returns false. if a and b: do_this else: do_this not[edit | edit source]The not operator only acts on one boolean and simply returns its opposite. So, true turns into false and false into true. if not a: do_this else: do_this The order of operations here is: not first, and second, or third. In particular, "True or True and False or False" becomes "True or False or False" which is True. Warning, logical operators can act on things other than booleans. For instance "1 and 6" will return 6. Specifically, "and" returns either the first value considered to be false, or the last value if all are considered true. "or" returns the first true value, or the last value if all are considered false. Bitwise Operators[edit | edit source]Python operators for bitwise arithmetic are like those in the C language. They include & (bitwise and), | (bitwise or), ^ (exclusive or AKA xor), << (shift left), >> (shift right), and ~ (complement). Augmented assignment operators (AKA compound assignment operators) for the bitwise operations include &=, |=, ^=, <<=, and >>=. Bitwise operators apply to integers, even negative ones and very large ones; for the shift operators, the second operand must be non-negative. In the Python internal help, this is covered under the topics of EXPRESSIONS and BITWISE. Examples:
Examples of augmented assignment operators:
Class definitions can overload the operators for the instances of the class; thus, for instance, sets overload the pipe (|) operator to mean set union: {1,2} | {3,4} == {1,2,3,4}. The names of the override methods are __and__ for &, __or__ for |, __xor__ for ^, __invert__ for ~, __lshift__ for <<, __rshift__ for >>, __iand__ for &=, __ior_ for |=, __ixor__ for ^=, __ilshift__ for <<=, and __irshift__ for >>=. Examples of use of bitwise operations include calculation of CRC and MD5. Admittedly, these would usually be implemented in C rather than Python for maximum speed; indeed, Python has libraries for these written in C. Nonetheless, implementations in Python are possible and are shown in the links to Rosetta Code below. Links:
References[edit | edit source]
External Links[edit | edit source]
How do you divide 2 numbers in Python?Python program to divide numbers user input
The result=number1/number2 is used to divide the two numbers. I have used print(result) to get the output.
How do you divide numbers in Python?In Python, there are two types of division operators: / : Divides the number on its left by the number on its right and returns a floating point value. // : Divides the number on its left by the number on its right, rounds down the answer, and returns a whole number.
Can you divide 2 variables in Python?Python Integer Division
To perform integer division in Python, you can use // operator. // operator accepts two arguments and performs integer division. A simple example would be result = a//b . In the following example program, we shall take two variables and perform integer division using // operator.
How do you use division in Python?Floor Division and True Division
In Python 3. x, slash operator ("/") does true division for all types including integers, and therefore, e.g. 3/2==1.5. The result is of a floating-point type even if both inputs are integers: 4 / 2 yields 2.0.
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