CODEWITHSUNDEEP
python
user2052436
user2052436

Reputation: 4775

Float to string general format

Python keeps using fixed format for large floats:

>>> str(1.0e-2)
'0.01'
>>> str(1.0e+2)
'100.0'
>>> str(1.0e-10)
'1e-10'
>>> str(1.0e+10)
'10000000000.0'

How can I make it print 1e+10 in the last case, similar to c++:

std::cout << 1.0e-2 << '\n'
          << 1.0e+2 << '\n'
          << 1.0e-10 << '\n'
          << 1.0e+10 << '\n';

0.01
100
1e-10
1e+10

I don't want to always use scientific notation.

How do I make Python conversion behave similar to C++ general format for

str(x)

when x is a float?

Upvotes: 2

Views: 71

Answers (1)

Johan
Johan

Reputation: 3611

You can do this with scientific notation

"{:e}".format(1.0e-7)

Or you can choose how many digits to show after the decimal by adding .n before the e

"{:.2e}".format(1.0e-7)

Upvotes: 3

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