Ethereum Cookbook

How to do it...

1. Create a function in solidity with the function keyword to perform a specific task. The following example demonstrates how we can create a simple function:

contract Test {    function functionName() {        // Do something    }}

2. Create another function to accept input parameters. These parameters can be declared just like variables. The following example accepts two parameters of type uint:

contract Test {    function add(uint _a, uint _b) public {        // Do something    }}

3. Define output parameters with the same syntax. The returns keyword is used to specify the return. The following function returns a variable of type uint:

contract Test {    function add(uint _a, uint _b) public pure        returns (uint sum)    {        sum = _a + _b;    }   }

4. Declare return ...