---
title: table.lookup_float
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/functions/table/table-lookup-float
---

```
FLOAT table.lookup_float(ID id, STRING key, FLOAT default)
```

**Available in:** all subroutines

Looks up the key `key` in the table `id`. When the key is present, its
associated value will be returned. When the key is absent, the `default`
value is returned. The `default` value is required.

## Example

```vcl
# data from https://www.worldatlas.com/articles/continents-by-population-density.html
# as of sept. 2019
table population FLOAT {
  "AF": 1.3,    # Africa
  "AN": 0.0,    # Antarctica
  "AS": 4.5,    # Asia
  "EU": 0.743,  # Europe
  "NA": 0.580,  # North America
  "OC": 0.0415, # Oceania
  "SA": 0.429,  # South America
}

declare local var.population FLOAT;
set var.population = table.lookup_float(population, client.geo.continent_code, 0.0);
if (var.population == 0.0) {
  # unknown
} else if (var.population >= 1.0) {
  # billions
} else {
  # millions or below
}
```