How to Eliminate Trailing Zeros When Formatting Floats in Python?

Eliminating Trailing Zeros in Float Formatting

Formatting floats can often result in strings with unnecessary trailing zeros, hindering readability and conciseness. This issue arises when the float value contains decimal places that, when rounded for display, become zero. To address this, it is preferable to format the float such that trailing zeros are eliminated.

One effective solution is to utilize the '%g' format specifier. This specifier ensures that insignificant trailing zeros are removed from the significand. Additionally, if no digits remain after rounding, the decimal point is also removed. For instance:

>>> '%g' % 3.140
'3.14'

Alternatively, you can employ the format() function, which provides similar functionality. In Python versions 2.6 and higher:

>>> '{0:g}'.format(3.140)
'3.14'

And in Python versions 3.6 and upward:

>>> f'{3.140:g}'
'3.14'

According to the format documentation, the 'g' format specifier removes trailing zeros from the significand and the decimal point if no digits follow it. This behavior guarantees that the resulting string is concise and accurately represents the intended value.

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