---
name: "Prelude.compose"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Prelude.compose"
---

# Prelude.compose(3kaya)

Compose two functions.

## NAME

Prelude::compose - Compose two functions.

## SYNOPSIS

**a(c) compose(** *a(b) f, b(c) g* **)**

## ARGUMENTS

**f** The first function to compose

**g** The second function to compose

## DESCRIPTION

Compose two functions: **compose(f,g)(x) == f(g(x))**

-

   Float double(Float x) {\
        return x\*2.0;\
    }\
    Int roundDown(Float y) {\
        return Int(floor(y));\
    }\
    Void main() {\
        combined = compose(roundDown,double);\
        a = combined(3.6);\
        // a = 7\
    }

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.