In this chapter, we will discuss how to return the global variable like block difficulty, gas limit, or others.

• block.coinbase (address payable): Current block miner's address.
• block.difficulty (unit): Current block difficulty
• block.gaslimit (unit): Current block gaslimit
• block.number (unit): Current block number
• block.timestamp (unit): Current block timestamp as seconds since unix epoch
• block.chainid (unit): Current chain id
• tx.gasprice (unit): Gas price of the transaction

Program:- 

pragma solidity ^0.8.0;

contract Test{
    
   function globalVariables(address any) public view returns(uint,uint,uint,uint,uint,uint,address){
      return (block.chainid,block.difficulty,block.gaslimit,block.number,block.timestamp,tx.gasprice,block.coinbase);
  }
}

This program will show the output:-

0: uint256: 1
1: uint256: 70762765929000
2: uint256: 6000000
3: uint256: 1
4: uint256: 1625465747
5: uint256: 1
6: address: 0x8945A1288dc78A6D8952a92C77aEe6730B414778