HOW TO MAKE MAPPING SOLIDITY CONTRACT

To create a mapping in a Solidity contract, you can follow the steps outlined below:

Step 1: Define the contract Create a new Solidity contract and define it using the contract keyword followed by the name of the contract.

pragma solidity ^0.8.0;

contract MyContract {
  // mapping goes here
}

Step 2: Declare the mapping Declare the mapping by specifying the key-value types. In the example below, the key is an address type and the value

mapping (address => uint) public balances;


Step 3: Add a function to update the mapping Add a function to update the mapping by specifying the key-value pair. In the example below, the setBalance function sets the balance for a given address.

function setBalance(address account, uint balance) public {
    balances[account] = balance;
}

Step 4: Add a function to retrieve the value Add a function to retrieve the value of the mapping for a given key. In the example below, the getBalance function retrieves the balance for a given address.

function getBalance(address account) public view returns (uint) {
    return balances[account];
}

Step 5: Compile and deploy the contract Compile the contract using a Solidity compiler and deploy it to the Ethereum network using a blockchain tool such as Remix or Truffle.

Congratulations! You have successfully created a Solidity contract with a mapping.

Write By MUSAD TECH