In this smartbook, we'll discuss about storage and memory word in solidity:

Storage

• Hold only state variables
• Gas cost required
• persistent means it's stored in our main blockchain storage with immutable functionality.
• It's like a Hard Drive of our computer.
• String by default stored in Storage.

Example:

contract Practice {

uint public a = 20;
string public name = "Anurag";

}

Memory

• Hold only " Local Variables ".
• No Gas cost is required.
• Not-persistent means not stored in our main blockchain storage.
• Like RAM in the computer.

Example:

contract Practice {
    
function getter( string memory name) public pure returns(string memory){
    return name;
}
    
}