Pure Function Solidity

Solidity and Pure Functions in Solidity

Solidity is a programming language used for writing smart contracts on the Ethereum blockchain. It is statically typed and supports object-oriented programming concepts. Solidity allows developers to define functions within their smart contracts.

A pure function in Solidity is a function that does not modify the state of the contract and does not read from the blockchain. It only operates on the input parameters and returns a value. Pure functions are useful for performing calculations or transformations without interacting with the blockchain.

To define a pure function in Solidity, you can use the pure keyword in the function declaration. Here's an example:

pragma solidity ^0.8.0;

contract MyContract {
    function add(uint256 a, uint256 b) public pure returns (uint256) {
        return a + b;

In the above example, the add function is declared as pure because it only performs a calculation and does not modify the contract state or read from the blockchain.

Note: It's important to ensure that a function is actually pure before declaring it as such. If a function modifies the contract state or reads from the blockchain, it should not be declared as pure.