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# Display scientific notation as float in Python

• Last Updated : 30 Jun, 2021

In this article, the task is to display the scientific notation as float in Python. The scientific notation means any number expressed in the power of 10.for example- 340 can be written in scientific notation as 3.4 X102.in pythons, we use str.format() on a number with “{:e}” to format the number to scientific notation. str.format() formats the number as a float, followed by “e+” and the appropriate power of 10. For example- 340 will be displayed as 3.4e+2

Example:

-51000000000.0000000 in scientific notation results in  “5.10e+10”,where the no. after “e+”denotes power of 10
-5189  in scientific notation results in  “5.189e+3”
-439929  in scientific notation results in  “4.39929e+5”

## Python3

 `# code``scientific_format ``=` `"{:e}"``.``format``(``512349000.000000``)` `print``(scientific_format)`

Output:

`5.123490e+08`

In the above example, the scientific notation of 512349000.000000 will be a decimal after the first digit and the power of 10 ie- 5.123490 X 108

To only include a certain number of digits after the decimal point, we use “{:.Ne}”, where N is the number of digits.

## Python3

 `# code``# code``# after decimal point,only 3 digit will be displayed``print``(``"{:.3e}"``.``format``(``345000``))`

Output:

`3.450e+05`

To display reverse of scientific numbers to float

We have to pass a variable holding the scientific format of a number, as follows:

## Python3

 `# code``x ``=` `3.234e``+``4` `print``(``"{:f}"``.``format``(x))  ``# f represents float`

Output:

`32340.000000`

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