float

Returns a float from a specified value. If no value is given, the default float 0.0 is returned.

If the specified value is of type str, then the initial characters of the string are converted until a non-digit character is found. Initial white space is ignored and the number may start with an optional + or - sign.

Type bool values are converted to 1.0 for true and 0.0 for false.

This function does not generate a change.

Function

float(value)

Arguments

Return value

A floating point value. Other type than float, str, bool, datetime, timeval or int will raise a bad_data_err().

Example

This code shows some return values for float():

[
    float(),
    float(42),
    float('0.365e+3 days'),
    float('0xFF'),
    float(true),
    float(false),
    float(datetime('2013-06-02T00:00:00Z')),
];

Return value in JSON format

[
    0,
    42.0,
    365.0,
    255.0,
    1.0,
    0.0,
    1370131200.0
]