float¶

Description¶

Returns an expression converted into a floating point number.

Syntax¶

float (number)

number: Optional. A numeric type other than complex number or string representation of a number.

Return Value¶

float

Time Complexity¶

#TODO

Note¶

When passing in a string, values for NaN and Infinity may be returned, depending on the underlying C library. Float accepts the strings nan, inf and -inf for NaN and positive or negative infinity. The case and a leading + are ignored as well as a leading - is ignored for NaN. Float always represents NaN and infinity as nan, inf or -inf.

Example 1¶

>>> float(1)
1.0
>>> float(1.34)
1.34
>>> float('2')
2.0
>>> float('-2')
-2.0
>>> float('-2.313123')
-2.313123

Example 2¶

>>> float('+nan')
nan
>>> float('-infinity')
-inf