Floating division in python

Float Division in Python

Output: Using Float Conversion In Python and all the other programming languages, division of a float number ( ) or division by a float number ( ) or division of a float number by a float number ( ), yields a floating-point result or quotient. Using Default Division In Python, the division performed by the division operation ( ) is, by default, float division.

Float Division in Python

float division refers to a Floating-point approximation of the result of a division or, mathematically speaking, the quotient. In comparison, integer division refers to an integer approximation of the quotient. Essentially, the floating part is completely removed from the result.

In statically-typed programming languages such as C , C++ , Go , Scala , and Java , floating division depends on the data type of the variables and the numerical values. Whereas, in the case of dynamically-typed programming languages such as Python , Groovy , PHP , Lua , and JavaScript , it depends on the numerical values (since variables don’t have a fixed data type and can be reused for a different type of values).

As stated above, Python is a dynamically-typed programming language. In this article, we will learn to perform Float Division in Python with the help of relevant examples.

Different Ways to Perform Float Division in Python

Essentially, Python has two ways to perform Float division, and we will try to learn them through some examples. Note that the examples provided will try to cover most of the possible cases.

Using Default Division

In Python, the division performed by the division operation ( / ) is, by default, float division. To achieve integer division, one can use the // operator. Refer to the following code for some examples.

print(1 / 3) print(2 / 7) print(8 / 3) print(9 / 4) print(11 / 10) print(121.0 / 8.0) print(8 / 121) print(10 / 11) print(4.0 / 9) print(3 / 8.0) 

0.3333333333333333 0.2857142857142857 2.6666666666666665 2.25 1.1 15.125 0.06611570247933884 0.9090909090909091 0.4444444444444444 0.375 

Using Float Conversion

In Python and all the other programming languages, division of a float number ( float/int ) or division by a float number ( int/float ) or division of a float number by a float number ( float/float ), yields a floating-point result or quotient. Note that the same concept applies to the double datatype.

In Python, we can convert an integer or a string representing a number, both integer and float number, to a floating-point number with the help of the float() function. Let us look at some examples to understand how we can perform float division with the help of Float Conversion.

print(float(1) / 3) # float / int print(float("2") / 7) # float / int print(8 / float(3)) # int / float print(9 / float("4")) # int / float print(float(11) / float(10)) # float / float print(float("121") / float("8")) # float / float print(float("8.0") / float("121.0")) # float / float print(float("10.00000") / 11) # float / int print(float("4") / float(9)) # float / float print(float(3) / float("8")) # float / float 

0.3333333333333333 0.2857142857142857 2.6666666666666665 2.25 1.1 15.125 0.06611570247933884 0.9090909090909091 0.4444444444444444 0.375 

Python Math

Python float division «rounding error» on division by 100, This is a well-known deficiency of floating-point numbers. You can think of binary floating-point as fractions with power-of-two denominators. Even a simple number such as 0.1 cannot be accurately represented as binary floating-point, and every division by a power of ten is by nature inaccurate.. If you need …

Float division error in python with variables

so I’m doing something really simple:

shared = sum*2.0/(totalCNV(CNVs1,str(chrom))+totalCNV(CNVs2,str(chrom))) 

ZeroDivisionError: float division 

So now I just want to make it a floating point division, but I don’t know how to do that. Can I just convert all the variables to floating points? Any suggestions? Cheers!

The error you’re getting implies that

(totalCNV(CNVs1,str(chrom))+totalCNV(CNVs2,str(chrom))) 

is evaluating to zero, so when you try to do a division with that as the denominator, you’re dividing by zero.

If that error is unexpected, chances are there’s a problem earlier in your code.

Python — Why does integer division return float?, For floating point inputs, it’ll still return a floored float value. The / (division) and // (floor division) operators yield the quotient of their arguments. The numeric arguments are first converted to a common type. Division of integers yields a float, while floor division of integers results in an integer; the result is …

Float division of big numbers in python

The decimal module should work. As seen in TigerhawkT3’s link, you can choose the number of decimal places your quotient should be.

from decimal import * getcontext().prec = 6 a = float(raw_input('The first number:')) #Can be int() if needed b = float(raw_input('The second number:')) c = Decimal(a) / Decimal(b) print float(c) 

You could use the decimal module:

from decimal import localcontext, Decimal def foo(a, b): with localcontext() as ctx: ctx.prec = 10 # Sets precision to 10 places temporarily c = Decimal(a) / Decimal(b) # Not sure if this is precise if a and b are floats, # str(a) and str(b) instead'd ensure precision i think. return float(c) 

you can calculate any type of length float number with this function

def longdiv(divisor,divident): quotient,remainder=divmod(divisor,divident) return (str(quotient)+str(remainder*1.0/divident)[1:]) 

Floating point — How to manage division of huge numbers, You can find the maximum that Python floating point values can take on your system using the sys module: >>> import sys >>> sys.float_info.max 1.7976931348623157e+308. To get around this limitation, instead use // to get an integer back from the division of the two integers: number // 10. This will return …

Python large floating division

I try make division in Python with float number but I am getting incorrect result even I try round float number but it didn’t work. Is there other wat how python make division for large float number?

>>> div = 1.45751734864e+15/30933 >>> print div 47118525478.9 

>>> double div = 1.45751734864e+15/30933; >>> System.out.println(div); 4.711852547893835E10 

Both Python and Java results are correct :

However , in Java, the number is printed in exponential notation format. So, it is equivalent to:

4.711852547893835 * 10 ^10 = 47118525478.9835

If you want to print your Python’s output as an exponential notation format as well use String format :

>>> div = 1.45751734864e+15/30933 >>> print ''.format(float(div)) 4.711853e+10 

You can increase the precision by using decimal module.

>>> from decimal import * >>> getcontext().prec = 30 >>> Decimal(1.45751734864e+15) / Decimal(30933) Decimal('47118525478.9383506287783273527') 

Read: http://docs.python.org/2/tutorial/floatingpoint.html and http://docs.python.org/2/library/decimal.html

The numbers returned by Python and Java are the same:

In [1]: 1.45751734864e+15/30933 Out[1]: 47118525478.93835 In [2]: 1.45751734864e+15/30933.0 Out[2]: 47118525478.93835 In [3]: 1.45751734864e+15/30933.0-4.711852547893835E10 Out[3]: 0.0 

Python 3.3.0 (default, Mar 22 2013, 20:14:41) [GCC 4.2.1 Compatible FreeBSD Clang 3.1 ((branches/release_31 156863))] on freebsd9 Type "help", "copyright", "credits" or "license" for more information. >>> 1.45751734864e+15/30933 47118525478.93835 >>> 1.45751734864e+15/30933-4.711852547893835E10 0.0 >>> 

Python large floating division, I try make division in Python with float number but I am getting incorrect result even I try round float number but it didn’t work. Is there other wat how python make division for large float number? >>> div = 1.45751734864e+15/30933 >>> print div 47118525478.9 same in java

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Python Division

Python Division – Integer Division & Float Division

Division operation is an arithmetic operation where we shall try to compute how much we have to divide dividend into equal parts, so that each of the divisor will get an equal amount.

In Python programming, you can perform division in two ways. The first one is Integer Division and the second is Float Division.

In this tutorial, we will learn how to perform integer division and float division operations with example Python programs.

Python Integer Division

Integer division means, the output of the division will be an integer. The decimal part is ignored. In other words, you would get only the quotient part. 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.

Python Program

a, b = 7, 3 result = a//b print(result)

You can also provide floating point values as operands for // operator. In the following example, we shall take two float values and compute integer division.

Python Program

a, b = 7.2, 3.1 result = a//b print(result)

The result is a float, but only quotient is considered and the decimal part or reminder is ignored.

Python Float Division

Float division means, the division operation happens until the capacity of a float number. That is to say result contains decimal part. To perform float division in Python, you can use / operator.

Division operator / accepts two arguments and performs float division. A simple example would be result = a/b.

In the following example program, we shall take two variables and perform float division using / operator.

Python Program

a, b = 7, 3 result = a/b print(result)

For float division, you can give any number for arguments of types: int or float.

Summary

In this tutorial of Python Examples, we learned how to perform two types of Python Division namely: Integer Division and Float Division.

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Float Division in Python

Float division refers to a floating-point approximation of the result of a division or, mathematically speaking, the quotient. In comparison, integer division refers to an integer approximation of the quotient. Essentially, the floating part is completely removed from the result.

In statically-typed programming languages such as C , C++ , Go , Scala , and Java , floating division depends on the data type of the variables and the numerical values. Whereas, in the case of dynamically-typed programming languages such as Python , Groovy , PHP , Lua , and JavaScript , it depends on the numerical values (since variables don’t have a fixed data type and can be reused for a different type of values).

As stated above, Python is a dynamically-typed programming language. In this article, we will learn to perform float division in Python with the help of relevant examples.

Different Ways to Perform Float Division in Python

Essentially, Python has two ways to perform float division, and we will try to learn them through some examples. Note that the examples provided will try to cover most of the possible cases.

Using Default Division

In Python, the division performed by the division operation ( / ) is, by default, float division. To achieve integer division, one can use the // operator. Refer to the following code for some examples.

print(1 / 3) print(2 / 7) print(8 / 3) print(9 / 4) print(11 / 10) print(121.0 / 8.0) print(8 / 121) print(10 / 11) print(4.0 / 9) print(3 / 8.0) 

0.3333333333333333 0.2857142857142857 2.6666666666666665 2.25 1.1 15.125 0.06611570247933884 0.9090909090909091 0.4444444444444444 0.375 

Using Float Conversion

In Python and all the other programming languages, division of a float number ( float/int ) or division by a float number ( int/float ) or division of a float number by a float number ( float/float ), yields a floating-point result or quotient. Note that the same concept applies to the double datatype.

In Python, we can convert an integer or a string representing a number, both integer and float number, to a floating-point number with the help of the float() function. Let us look at some examples to understand how we can perform float division with the help of float conversion.

print(float(1) / 3) # float / int print(float("2") / 7) # float / int print(8 / float(3)) # int / float print(9 / float("4")) # int / float print(float(11) / float(10)) # float / float print(float("121") / float("8")) # float / float print(float("8.0") / float("121.0")) # float / float print(float("10.00000") / 11) # float / int print(float("4") / float(9)) # float / float print(float(3) / float("8")) # float / float 

0.3333333333333333 0.2857142857142857 2.6666666666666665 2.25 1.1 15.125 0.06611570247933884 0.9090909090909091 0.4444444444444444 0.375 

Vaibhav is an artificial intelligence and cloud computing stan. He likes to build end-to-end full-stack web and mobile applications. Besides computer science and technology, he loves playing cricket and badminton, going on bike rides, and doodling.

Related Article — Python Math

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