# Solidity Pure Functions

In this article, we will discuss the basics of Solidity pure functions and explore their benefits and limitations.

Table Of Content-

## What are Solidity Pure Functions?

The pure keyword is used to declare pure functions in Solidity.

Solidity pure function do not modify a contract’s state, and they don’t access or read outside the state.

Pure functions only depend on their inputs and have no other effects. In other words, it doesn’t change any state outside of its local scope.

Performing calculations or transforming data using pure functions does not alter the contract’s state, which makes them particularly useful.

The following example shows the working of Solidity pure function:

#### Example:

// SPDX-License-Identifier: 3.0 pragma solidity ^0.8.0;contract SolidityTest{function get_Product(uint mrx,uint ample) public pure returns(uint){uint product=mrx*ample; return product; }}
In a solidity pure function, the variables are initialized inside the function block, which makes them inaccessible to the other functions. The given example illustrates the working as follow:

#### Example:

// SPDX-License-Identifier: 3.0 pragma solidity ^0.8.0;contract SolidityTest{function get_Modulus() public pure returns (uint){uint mrx=10; uint ample=3;uint modulus=mrx%ample;return modulus; }}

## Benefits

1-  Among the key benefits of Solidity pure functions is their ability to reduce the cost and complexity of smart contract development.

You can reduce the gas costs associated with executing their contracts by using pure functions for calculations and data manipulation instead of interacting with the blockchain.

2-  Additionally, pure functions can improve smart contract security and reliability. Due to the fact that pure functions do not modify the state of a contract, they cannot introduce bugs or vulnerabilities that could compromise the integrity of the contract or compromise the blockchain’s security.

3- The main advantage of Pure Functions is that they are deterministic. This means that for a given input, the output of a Pure Function will always be the same. Pure Functions can be used for a variety of tasks, such as converting between units, performing mathematical calculations, or verifying signatures.

4- Pure Functions cannot modify the state of the contract. They cannot read from or write to any storage variables or emit events. This makes them very useful for performing calculations that do not require modifying the contract’s state.

5- Pure Functions do not have any side effects. They do not affect the behavior of any other function or alter the environment of the contract. This makes them predictable and easy to reason about.

### Conclusion

Solidity’s pure functions are powerful features for developing smart contracts. Pure functions reduce the costs and complexity of smart contract development while improving the security and reliability of the blockchain.

This is done by enabling lightweight, efficient, and deterministic calculations and data manipulation.

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