Ethereum functions Burn and Transfer source

Question

Hey people.. I was reading  an example for an ethereum token with such functionalities as transferring and burning coins. I found the following code:

function burn(uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value);   // Check if the sender has enough
        balanceOf[msg.sender] -= _value;            // Subtract from the sender
        totalSupply -= _value;                      // Updates totalSupply
        Burn(msg.sender, _value);
        return true;
    }

I understood that we take coins from sender, then take it from the total supply, but I didnt get what this line does:

        Burn(msg.sender, _value);

Can someone tell me about this?

Answer 1

This statement is used to publish an event that is declared earlier in the code: 

event Burn(address indexed from, uint256 value);

To know more about this, visit: https://programtheblockchain.com/posts/2018/01/24/logging-and-watching-solidity-events/.