ligo/gitlab-pages/docs/language-basics/functions.md

id	title
functions	Functions

Defining a function

Body of a function consists of two parts, the first part (block {} or begin ... end) - normally consists of logic (flow conditions, variable declarations, etc.), and the second part (with ...) usually defines the return value of your function.

const availableSupply: nat = 15n;
const totalSupply: nat = 100n;

function calculatePrice(const available: nat; const total: nat): nat is
    begin
        const price: nat = total / available
    end with price

const price: nat = calculatePrice(availableSupply, totalSupply);

Functions without an explicit body (shorter syntax)

A short hand syntax for the same function as above can inline the price calculation directly into the return statement. While this approach can have it's benefits, it can decrease readability.

const availableSupply: nat = 15n;
const totalSupply: nat = 100n;

function calculatePrice(const available: nat; const total: nat): nat is
    block { skip } with total / available

const price: nat = calculatePrice(availableSupply, totalSupply);