docs-v2/content/flux/v0.x/stdlib/universe/float.md

title	description	menu	weight	flux/v0.x/tags	introduced
float() function	`float()` converts a value to a float type.	flux_0_x_ref name parent identifier float universe universe/float	101	type-conversions	0.7.0

float() converts a value to a float type.

Function type signature

(v: A) => float

{{% caption %}}For more information, see Function type signatures.{{% /caption %}}

Parameters

v

({{< req >}}) Value to convert.

Examples

• Convert a string to a float
• Convert a scientific notation string to a float
• Convert an integer to a float
• Convert all values in a column to floats

Convert a string to a float

float(v: "3.14")// Returns 3.14

Convert a scientific notation string to a float

float(v: "1.23e+20")// Returns 1.23e+20 (float)

Convert an integer to a float

float(v: "10")// Returns 10.0

Convert all values in a column to floats

If converting the _value column to float types, use toFloat(). If converting columns other than _value, use map() to iterate over each row and float() to covert a column value to a float type.

data
    |> map(fn: (r) => ({r with exampleCol: float(v: r.exampleCol)}))

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Input data

_time	exampleCol	*tag
2021-01-01T00:00:00Z	-2	t1
2021-01-01T00:00:10Z	10	t1
2021-01-01T00:00:20Z	7	t1
2021-01-01T00:00:30Z	17	t1
2021-01-01T00:00:40Z	15	t1
2021-01-01T00:00:50Z	4	t1

_time	exampleCol	*tag
2021-01-01T00:00:00Z	19	t2
2021-01-01T00:00:10Z	4	t2
2021-01-01T00:00:20Z	-3	t2
2021-01-01T00:00:30Z	19	t2
2021-01-01T00:00:40Z	13	t2
2021-01-01T00:00:50Z	1	t2

Output data

_time	exampleCol	*tag
2021-01-01T00:00:00Z	-2	t1
2021-01-01T00:00:10Z	10	t1
2021-01-01T00:00:20Z	7	t1
2021-01-01T00:00:30Z	17	t1
2021-01-01T00:00:40Z	15	t1
2021-01-01T00:00:50Z	4	t1

_time	exampleCol	*tag
2021-01-01T00:00:00Z	19	t2
2021-01-01T00:00:10Z	4	t2
2021-01-01T00:00:20Z	-3	t2
2021-01-01T00:00:30Z	19	t2
2021-01-01T00:00:40Z	13	t2
2021-01-01T00:00:50Z	1	t2

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