#    
## Overview

In #key# Solidity:  An object-oriented programming language #key#, when an `event` is triggered, it keeps the parameters supplied in the transaction logs as an inheritable part of the `contract`. 

## What are events?
**Events** are member contracts that can be inherited and triggered or emitted to store transaction log arguments, which can be accessed through an address on the blockchain.

## Events declaration syntax
```
event <eventName>(parameters) ;
```

## Code example

The following code shows the usage of the `emit` to trigger a simple `event`.

pragma solidity ^0.5.0;

contract sample {
   event Save(address indexed _from, bytes32 indexed _id, uint _value);
   function save(bytes32 _id) public payable {      
      emit Save(msg.sender, _id, msg.value);
   }
}

## Code explanation
In the provided code example, we demonstrate a simple `event` (i.e., `Save`).

* In line 3, we instantiate a contract `sample`.

* In line 4, we create our event `Save`.

* In line 5, we create a function to trigger the `event` using the `emit` keyword in line 6.

## Simple diagram of Solidity events

The Solidity events can be visualized using the figure below.

What are events in Solidity?

Events in Solidity are used to log transaction arguments on the blockchain, which can then be accessed by an address.