```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

{* ../../docs_src/path_params_numeric_validations/tutorial005_an_py39.py hl[10] *}

## Validierung von Zahlen: Floats, größer und kleiner { #number-validations-floats-greater-than-and-less-than }

Zahlenvalidierung funktioniert auch für <abbr title="Fließkommazahlen">`float`</abbr>-Werte.

pkg image/color, type NYCbCrA struct, A uint8
pkg image/color, type NYCbCrA struct, embedded YCbCr
pkg image/color, var NYCbCrAModel Model
pkg math/big, method (*Float) MarshalText() ([]uint8, error)
pkg math/big, method (*Float) UnmarshalText([]uint8) error
pkg math/big, method (*Int) Append([]uint8, int) []uint8
pkg math/big, method (*Int) Text(int) string
pkg math/rand, func Read([]uint8) (int, error)

	switch {
	case e.Int != nil:
		if *e.Int < math.MaxInt64 && *e.Int > math.MinInt64 {
			return FromInt(int64(*e.Int)), nil
		}
		return FromFloat(*e.Int), nil
	case e.Float != nil:
		return FromFloat(*e.Float), nil
	case e.String != nil:
		return FromString(string(*e.String)), nil
	case e.Boolean != nil:
		return FromBool(bool(*e.Boolean)), nil
	case e.Missing:
		return FromMissing(), nil
	}

        try {
            if (threadConfiguration.endsWith("C")) {
                String str = threadConfiguration.substring(0, threadConfiguration.length() - 1);
                float coreMultiplier = Float.parseFloat(str);

                if (coreMultiplier <= 0.0f) {
                    throw new IllegalArgumentException("Invalid threads core multiplier value: '" + threadConfiguration

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

{* ../../docs_src/path_params_numeric_validations/tutorial005_an_py39.py hl[10] *}

## Validaciones numéricas: flotantes, mayor y menor { #number-validations-floats-greater-than-and-less-than }

Las validaciones numéricas también funcionan para valores `float`.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

func NewRecord(f sql.SelectObjectFormat) *Record {
	return &Record{
		KVS:          jstream.KVS{},
		SelectFormat: f,
	}
}

// jsonFloat converts a float to string similar to Go stdlib formats json floats.
func jsonFloat(f float64) string {
	var tmp [32]byte
	dst := tmp[:0]

	// Convert as if by ES6 number to string conversion.
	// This matches most other JSON generators.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):