learningConversions

pragma solidity >= 0.8.20

contract learnConversions {

//  uint (default alias for uint256) is a unsigned integer, which has:
//    - minimum value of 0
//    - maximum value of 2^16-1 = (115792089237316195423570985008687907853269984665640564039457584007913129639935) 
//78 decimal digits // uint number = 2;
    
// Conversion to smaller type costs higher order bits
uint32 a = 0x12345678;
uint16 b = uint16(a); // b = 0x5678

// Conversion to higher type adds padding bits to the left
uint16 c = 0x1234;
uint32 d = uint32(c); // d = 0x00001234 

// What is the cost? 
// Conversion to smaller bytes costs higher order data 
bytes2 e = 0x1234;
bytes1 f = bytes1(e); // f = 0x12

// What does this add? 
// Conversion to larger bytes adds padding bits to the right
bytes2 g = 0x1234;
bytes4 h = bytes4(g); // h = 0x12340000
}