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# Display scientific notation as float in Python

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`

My Personal Notes arrow_drop_up